This easy Mexican Casserole will be a new family favorite and an easy weeknight meal! It comes together with rice, seasoned lean ground beef and a rainbow of veggies that is baked together with a cheesy topping! It can be prepped ahead and reheats well. It is also adaptable to your families preferences. See below for how easy this comes together and tips/substitution ideas.

Mexican Beef, Rice and Veggie Casserole Adaptations
- Rice: I used brown, but you can use white or pre-cooked quinoa as well
- Lean Ground Beef can be substituted with:
- Ground Turkey
- Half Beef/ Half Turkey
- Only 1 lb of beef and a can of black beans
- Make it vegetarian and only put in beans and add some corn
- Veggies:
- I did shredded zucchini as a way to get my kids to eat it, since you don’t notice or really taste it
- You can use corn or more peppers
- Cheese: If you have someone who is dairy intolerant you can leave a section without cheese or use your favorite dairy free alternative

Let it cool 5 minutes before serving & serve with avocados and sour cream (optional). See notes for reheating instructions if you are serving this on a night when you have multiple eating times due to activities 🤪.

Mexican Beef, Rice, & Veggie Casserole
- 1 tablespoon extra-virgin olive oil
- 2 pounds lean ground beef (90% & 93%)
- 1 small onion diced (about 1 cup)
- 1 zucchini grated
- 1 medium bell pepper, chopped
- 6 garlic cloves, minced
- 3 teaspoons paprika
- 2 teaspoons dried oregano
- 2 teaspoons salt
- 2 tablespoons tomato paste
- 1 (10 ounce ) package cooked brown rice
- 1 ½ cups chicken broth
- 1 1/2 cups shredded low-moisture part-skim mozzarella cheese and/or cheddar mixed
Ingredients:
Prepare:
- Grease a 9-by-13-inch baking pan with your favorite cooking spray and preheat oven to 400 degrees if you are cooking right away.
- Heat oil in a large nonstick skillet over medium heat. Add beef; cook, stirring often and using the back of a spoon to break it up, until cooked through and no longer pink, about 5 minutes.
- Strain grease.
- Add onion, bell peppers, garlic, paprika, oregano, salt and pepper; cook, stirring often, until the vegetables are tender, about 8 minutes. Increase heat to medium-high and stir in tomato paste; cook, stirring constantly, until the paste darkens in color, about 1 minute. Remove from heat. Stir rice and broth.
- Transfer the mixture to a 9-by-13-inch baking dish; cover with foil.
Cook:
- If prepping ahead of time wrap with foil and place in refrigerator until you are ready to cook
- When ready to cook: Bake until the rice is tender and the flavors meld, about 20 minutes.
- Uncover and sprinkle evenly with cheese. Bake, uncovered, until the cheese is melted and beginning to bubble, about 10 minutes.
- Let cool for 5 minutes before serving. Option to serve with avocado and sour cream.
Reheating:
1. Take out about 1 hour before you want to eat it if possible.
2. Place in oven at 350 for about 10-15 minutes. If it is not at room temperature it may need another 10 minutes.
1. Take out about 1 hour before you want to eat it if possible.
2. Place in oven at 350 for about 10-15 minutes. If it is not at room temperature it may need another 10 minutes.


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