Mexican-Style Breakfast Casserole

Step 1
Preheat the oven to 350 degrees F (175 degrees C). Spray a 9×13-inch pan with cooking spray.

Step 2
Spray a small pan with cooking spray and heat over medium heat; stir in onion. Cook and stir until the onion has softened and turned translucent, about 5 minutes.

Step 3
Transfer onions to a large bowl and mix in hash browns, ham, taco-flavored cheese, and chile peppers. Layer in the bottom of the prepared pan.

Step 4
Whisk eggs, milk, sour cream, and taco seasoning together in a bowl. Pour on top of the hash brown layer.

Step 5
Bake in the preheated oven until a knife inserted into the center comes out clean, 45 to 60 minutes; check every 5 minutes toward the end.

Step 6
Remove from the oven and spread Mexican cheese on top. Return to the oven and bake until cheese is melted, about 3 minutes. Let casserole stand for 5 minutes to set before serving.