Mexican-Style Sweet Potato and Quinoa Casserole

Make a hearty, healthy vegan Mexican sweet potato and quinoa casserole that’s perfect for meal prep or feeding a crowd. This one-dish meal brings together pantry staples, root vegetables and bold Mexican-inspired flavors for an easy weeknight dinner or batch-cooked lunch.

Too often we open the pantry and think there’s nothing to make. This Mexican Sweet Potato Quinoa Casserole solves that problem by using long-lasting staples you likely already have. It’s vegetarian, naturally vegan, packed with fiber and plant protein, and simple to throw together.

We Love Pantry Staple Meals

This casserole is a pantry-friendly recipe designed to be convenient without sacrificing flavor. The base ingredients—quinoa, canned beans, salsa and tomatoes—store well and combine with fresh sweet potatoes and onions for a balanced, satisfying dish. The result is a hearty, shelf-stable-friendly meal that works great for meal prep and leftovers.

What makes a good pantry-staple meal? Choose ingredients with long shelf lives that you enjoy and can mix into many different dishes. For this recipe that means quinoa, canned beans, canned tomatoes, jarred salsa and vegetable broth. When combined with a couple of fresh items, you get a nourishing casserole with minimal effort.

Here are the Ingredients You Need

Below is a quick rundown of the key components and why they work in this casserole.

Sweet potatoes: Nutritious and naturally sweet, sweet potatoes add texture and substance. They store well in a cool, dark pantry or cellar and become tender and creamy when baked.

Quinoa: A complete protein, quinoa boosts the dish’s nutrition while keeping it meatless. In this casserole the quinoa cooks right in the dish, absorbing the sauce and flavors.

Onion: Adds savory depth and a pleasant bite that complements the sweet potatoes.

Black beans: Provide a dense, “meaty” texture and additional plant protein. Canned beans are convenient and economical.

Vegetable broth: The cooking liquid that allows the quinoa to expand and become tender—using broth instead of water adds subtle savory notes.

Salsa, diced tomatoes, and green chilis: These combine to make the casserole saucy and aromatic. Use your preferred salsa to control spice and smokiness.

DIY taco seasoning: A simple spice mix (chili, cumin, garlic powder, oregano, salt) brings classic Mexican flavors; store-bought seasoning works too.

Changes You Can Make to this Recipe

• Swap sweet potatoes for white potatoes or another root vegetable if you prefer.
• Switch black beans for pinto beans, chickpeas, or another canned bean.
• If you don’t like quinoa, use minute rice instead—replace 1 cup quinoa with 1.5 cups minute rice and adjust liquid accordingly.
• Add chopped bell peppers, corn, or zucchini for extra color and texture.

More Quinoa Casserole Ideas

• Asian stuffed pepper steak quinoa casserole
• Sweet potato green curry quinoa casserole
• Meat lovers pizza quinoa casserole
• Broccoli and cheese quinoa casserole
• Spinach quinoa lasagna-style casserole

Watch How to Make this Recipe

A video demonstration can be helpful for timing and texture cues; if you have a visual guide available, watch the full process to see how the casserole should look before and after baking.

Mexican Sweet Potato Quinoa Casserole

Whip up this healthy, vegan Mexican quinoa and sweet potato casserole for an easy meal-prep dish that feeds a crowd. The combination of quinoa, beans and vegetables creates a filling, flavorful casserole that reheats well.

Author: Lee Funke

Prep: 10 mins · Cook: 1 hr 10 mins · Total: 1 hr 20 mins · Servings: 6

Ingredients

• 2 medium sweet potatoes, peeled and cubed
• 1 medium yellow onion, chopped
• 1 cup white quinoa
• 1 12-oz jar salsa (mild or hot, to taste)
• 1 15-oz can diced tomatoes
• 1 4-oz can green chilis
• 2 15-oz cans black beans, drained and rinsed
• 3 tablespoons taco seasoning (homemade or store-bought)
• 3 cups vegetable broth
• Optional toppings: fresh cilantro, sliced avocado, lime wedges

Instructions

1. Preheat the oven to 375ºF (190ºC). Lightly spray a large casserole dish with non-stick cooking spray or grease it with a small amount of oil.
2. Combine the cubed sweet potatoes, chopped onion, quinoa, salsa, diced tomatoes, green chilis, black beans, taco seasoning and vegetable broth in the casserole dish. Stir thoroughly so the quinoa is evenly distributed and submerged in the liquid.
3. Cover the dish tightly with aluminum foil and bake for 30 minutes.
4. Carefully remove the casserole from the oven, stir to redistribute any settled ingredients, re-cover with foil, and return it to the oven for an additional 40 minutes, or until the quinoa is tender and the sweet potatoes are cooked through.
5. Take the casserole out of the oven and let it rest, covered, for 10 minutes before serving. This allows the quinoa to finish absorbing the liquid and firms up the casserole for easier serving.
6. Serve warm topped with cilantro, sliced avocado and a squeeze of fresh lime juice if desired.

Tips for Success and Storage

To make this recipe ahead, bake as directed and cool completely before refrigerating. Store in an airtight container for up to 4 days, or freeze individual portions for up to 3 months. Reheat in the microwave or oven, adding a splash of broth if needed to refresh moisture. Taste and adjust seasoning before serving—sometimes a pinch more salt or lime brightens the flavors after storage.

Nutrition

Nutrition information is provided as an estimate.

• Calories: 313 kcal
• Carbohydrates: 60 g
• Protein: 14 g
• Fat: 2 g
• Fiber: 14 g
• Sugar: 7 g