I think I’ve made just about every fajita under the sun.
I’ve done sheet pan baked fajitas, salmon fajitas, fajita salads, fajita kebabs…what else is left that I can tackle?!
The answer to that question: a casserole. Casseroles are hands down my favorite (and my husband makes fun of me for it). They’re the easiest, quickest-to-cleanup meals on the planet. Casseroles run through my blood…they’re definitely a part of my identity.
This casserole is an ooey, gooey, cheesy, decadent baked meal. There’s a ton of cheese inside (no complaints from me) and lots of chopped veggies (bell peppers and onions). Adding a good dose of premade queso really sends this casserole over the top.
I love my fajita peppers and onions crispy, so I didn’t cook them before I settled them inside the casserole. If you like your peppers and onions more on the soft side, throw them in a pan with some olive oil and saute them for a few minutes before you put together the casserole.
As for the chicken in this recipe, you need to really pile on the fajita seasoning. You can find pre-made fajita seasoning in most grocery stores in the spice aisle. If you can’t find it, just use a lot of black pepper, garlic powder, onion powder and cumin to season your chicken with.
Enjoy!
Chicken Fajita Casserole

Everything good about chicken fajitas made easier by making a casserole.
Ingredients
- 1 lb. chicken breast, cubed
- 1 TBS. olive oil
- 2 TBS. fajita seasoning
- 1 red bell pepper, diced
- 1 yellow bell pepper, diced
- 1 green bell pepper, diced
- 1 red onion, diced
- 2 (10 oz) packages frozen cauliflower rice, cooked
- 1 cup queso (cheese sauce)
- 1/2 cup Monterey Jack cheese
- Sour cream and sliced avocados, for serving
Directions
- Preheat oven to 375 degrees. Heat oil in a large skillet over medium-high heat. Season chicken with fajita seasoning and cook until browned, about 4-5 minutes per side. Set cooked chicken aside.
- In a large bowl, stir together peppers, onions, queso, cauliflower rice and half of the Monterey Jack cheese. Add chicken and stir. Spray a large 13×9″ baking dish with cooking spray. Pour chicken and cauliflower rice mixture into prepared baking dish. Top with remaining Monterey Jack cheese.
- Bake for 25-30 minutes or until mixture is set. Serve with sour cream and sliced avocados.
Step-By-Step Instructions
Preheat oven to 375 degrees. Heat oil in a large skillet over medium-high heat. Season chicken with fajita seasoning and cook until browned, about 4-5 minutes per side. Set cooked chicken aside.
In a large bowl, stir together peppers, onions, queso, cauliflower rice and half of the Monterey Jack cheese.
Add chicken and stir. Spray a large 13×9″ baking dish with cooking spray.
Pour chicken and cauliflower rice mixture into prepared baking dish. Top with remaining Monterey Jack cheese.
Bake for 25-30 minutes or until mixture is set. Serve with sour cream and sliced avocados.
Gotta love Mexican cuisine. 🍁🍂🌾