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    Homebody Eats » Recipes » Main Dish » Cheesy Mexican Quinoa Casserole Bake (Vegetarian Friendly)

    Cheesy Mexican Quinoa Casserole Bake (Vegetarian Friendly)

    Published: Jul 18, 2019 · Modified: Feb 28, 2022 by Jessica Mode · This post may contain affiliate links, which means I'll receive a commission if you purchase through the link, at no extra cost to you. Please see full disclosure for more details.

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    Bake up a one pan cheesy Mexican inspired casserole with veggies in under 30 minutes

    This one pan Mexican quinoa bake is loaded with veggies. With only 30 minutes, you can whip up a cheesy Mexican casserole the whole family will love. This recipe makes 10 servings, so it will feed a crowd or make you lots of leftovers! All you need is a cast iron skillet to make this quinoa vegetarian casserole. Add some chips and guacamole as a side dish for a perfect weeknight dinner!

    quinoa vegetarian casserole topped with cheese in cast iron skillet
    Jump to:
    • What You'll Learn In This Recipe
    • Ingredient Notes
    • Tools & Equipment
    • Recipe Frequently Asked Questions
    • Cheesy Mexican Quinoa Casserole Bake
    • Other Recipes You May Enjoy

    I often have weeknights that I don't feel like cooking. Either I'm low on time, nothing sounds good, or I just don't have a lot of food in the refrigerator. Luckily, you can whip up this quinoa vegetarian casserole even if you're low on time and ingredients!

    This Mexican quinoa bake is filled with healthy veggies including black beans and bell peppers. Then, we'll load the top of the casserole with a hearty serving of white cheddar cheese to round out the dish. Everything bakes up perfectly in the oven and the cheey top gets golden brown.

    What You'll Learn In This Recipe

    I love to teach you a new skill in the kitchen with every recipe on this site. By making this recipe you'll learn:

    • Some easy substitutions to use if you're making this recipe without many ingredients on hand
    • How to care for your cast iron skillet
    • Some easy side dishes and toppings to pair with the cheesy veggie bake

    For more tips for improving your skills in the kitchen, sign up for my 5 day email series. You'll learn so many quick tips within this series.

    cheesy Mexican veggie bake with avocado garnish

    Ingredient Notes

    • Dried quinoa: Optionally, you can used a red or multi-colored quinoa.
    • Extra-virgin olive oil: This is my oil of choice for sautéeing up vegetables.
    • Orange & Red bell pepper: A yellow bell pepper would work as well.
    • Red onion: Need help dicing an onion? Check out this one minute tutorial! You'll be chopping onions like a chef in no time!
    • Garlic: ½ teaspoon of garlic powder could be used to replace the fresh or jarred minced garlic.
    • Canned black beans: Be sure to drain and rinse before using. This helps remove excess salt and build up on the beans.
    • Canned diced tomatoes with green chilies: You can also substitute for a regular can of diced tomatoes, if needed.
    • Tomatillo salsa: Feel free to substitute for another type of salsa to make the dish more spicy or to accomodate what you have on hand.
    • White cheddar cheese: This can be substitutted for any type of cheddar cheese or Colby Jack. Optionally, you can remove the cheese all together for a lighter or vegan version of the dish.
    • Avocado/Green Onions: These are completely optionally but make a delicious garnish!
    Cheesy Mexican casserole with green onion and avocado garnish

    Tools & Equipment

    Here are the kitchen tools you'll need to make the cheesy Mexican casserole:

    • Chef's Knife: A high quality, sharp chef's knife will help you cut up all the vegetables in this dish in no time.
    • Saucepan: We'll be using this to cook the quinoa.
    • Cast Iron Skillet: This is one of my favorite kitchen tools - I use it almost every day. Be sure, if you're investing in a quality cast iron, that you learn how to properly take care of it. You can wash the cast iron with soap. Just be sure not to let it soak in water or soap. The main thing is to ensure your skillet is properly dried so it doesn't rust. Here's a short tutorial that shows you everything you need to know.
    • Box Grater: This is only necessary if you need to shred your own cheese!

    Recipe Frequently Asked Questions

    What type of side dish pairs well with the Mexican casserole bake?

    I love to serve this meal with a side of chips and guacamole or queso, along with something healthy like an avocado salad or plantains.

    What are some toppings/garnishes I can use?

    Feel free to switch up the garnishes and toppings you use for this dish. Some of my favorite ideas include:

    - Sour cream
    - Cilantro
    - Guacamole
    - Pico de gallo
    - Fresh lime wedges
    - Jalapenos

    Use what you have, or better yet, put a little of each topping in the middle of the dinner table for everyone to garnish their own dish as they like.

    What's the best way to reheat leftovers?

    If you're feeling lazy, throw the leftovers in a microwave safe bowl and heat on high (100 percent power) for 2 -3 minutes until warmed all the way through.

    Alternatively, reheat in an oven safe dish covered with foil at 375°F for 10 - 15 minutes until warmed all the way through.

    Vegetarian quinoa bake topped with avocado and tortilla chips
    Mexican quinoa bake in cast iron skillet.

    Cheesy Mexican Quinoa Casserole Bake

    This one pan Mexican quinoa bake is loaded with veggies. With only 30 minutes, you can whip up a cheesy Mexican casserole the whole family will love. This recipe makes 10 servings, so it will feed a crowd or make you lots of leftovers! All you need is a cast iron skillet to make this quinoa vegetarian casserole. Add some chips and guacamole as a side dish for a perfect weeknight dinner!
    Author: Jessica Mode
    5 from 2 votes
    Print Recipe Pin Recipe
    Active Time 30 mins
    Cook Time 25 mins
    Total Time 30 mins
    Course Main Course
    Cuisine Mexican
    Servings 10 servings
    Calories 281 kcal

    Ingredients
      

    • 2 cups dried quinoa
    • 1 tablespoon extra-virgin olive oil
    • 1 orange bell pepper stemmed, seeded, and diced into ½ inch pieces
    • 1 red bell pepper stemmed, seeded, and diced into ½ inch pieces
    • 1 medium red onion finely diced
    • 2 cloves garlic minced
    • 2 (15 ounce) canned black beans drained and rinsed
    • 2 (10 ounce) canned diced tomatoes with green chilies drained
    • 1½ cups tomatillo salsa
    • 10 ounces white cheddar cheese shredded
    • avocado for garnish
    • green onions sliced on the bias for garnish

    Instructions
     

    • Place quinoa and 4 cups of water in a medium saucepan. Cook according to package instructions.
    • While quinoa is cooking, heat extra-virgin olive oil in a 12 inch cast iron skillet over medium-high heat. Add bell peppers and onions to the skillet and cook stirring occasionally until the onions become translucent, about 7 minutes. Reduce heat to low and add in garlic, black beans, and tomatoes with chilies. Cook for an additional two minutes, then remove from heat.
    • Mix the salsa and cooked quinoa together until combined. Pour the quinoa into the vegetables in the skillet and stir until the mixtures are well combined.
    • Top with shredded cheese. Place cast iron skillet under the broiler until cheese is golden and bubbly, about 4 minutes. Be sure not to walk away from the dish while it's in the broiler otherwise something may burn.
    • Garnish with avocado and green onions. Serve immediately.

    Notes

    Reheating Instructions:
    Microwave: Place in a microwave safe bowl and heat on high (100 percent power) for 2 -3 minutes until warmed all the way through.
    Oven: Place in an oven safe dish covered with foil at 375°F for 10 - 15 minutes until warmed all the way through.

    Nutrition

    Calories: 281kcalCarbohydrates: 27gProtein: 12gFat: 13gSaturated Fat: 6gPolyunsaturated Fat: 2gMonounsaturated Fat: 4gCholesterol: 30mgSodium: 424mgPotassium: 358mgFiber: 3gSugar: 4gVitamin A: 1246IUVitamin C: 33mgCalcium: 226mgIron: 2mg
    Have you tried this recipe?Tag @homebody.eats on Instagram so we can see your creations!

    Other Recipes You May Enjoy

    Here are some other Mexican-inspired recipes you may enjoy:

    • Instant Pot Chicken Tamales
    • Chorizo Breakfast Tacos
    • Avocado & Tomato Salad
    • Simple Chorizo Street Tacos
    Double Butter Chocolate Chip Cookie »

    Reader Interactions

    Comments

    1. Sherry

      December 14, 2021 at 8:24 PM

      5 stars
      I have a family of 7 and this easily fed everyone for dinner! It's hard to find recipes that can feed us all and that everyone likes. Thank you so much for this!!

      Reply

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