01 -
Set oven to 350°F (177°C) and allow to preheat while preparing ingredients.
02 -
Heat a large skillet over medium-high heat. Add ground beef and break apart with a spoon. Cook until browned and no longer pink, stirring occasionally. Drain excess fat.
03 -
In a medium mixing bowl, combine biscuit mix with water. Blend by hand until dough forms. Spray a 9 x 13 inch casserole dish with cooking spray. Press biscuit dough evenly into dish, spreading to edges. Bake in preheated oven for 5–8 minutes, until dough is just set and lightly golden. Remove and set aside.
04 -
To the skillet with cooked beef, add chopped onion and red bell pepper. Stir and sauté for about 4 minutes. Add taco seasoning, mix well, then remove skillet from heat.
05 -
Evenly distribute the cooked beef and vegetable mixture over the pre-baked biscuit crust in the casserole dish.
06 -
In a clean medium bowl, combine sour cream, mayonnaise, drained green chiles, 3/4 cup shredded cheddar cheese, and garlic powder. Mix until smooth.
07 -
Carefully spread the sour cream mixture over the beef layer, covering evenly.
08 -
Drop spoonfuls of salsa over the sour cream layer without spreading. Sprinkle the remaining 3/4 cup shredded cheddar cheese evenly on top.
09 -
Place the assembled casserole back in the oven, uncovered, and bake for 30 minutes or until the center is hot and the top is bubbly and golden.
10 -
Allow casserole to rest for 10 minutes before slicing and serving.