Preheat oven to 350 degrees F / 177 degrees C.
Slice 4 medium green peppers lengthwise through the middle. Remove seeds.
4 medium green peppers
Place cut-side down in medium casserole dish with ¼ cup water. Cover tightly with foil and bake for 10 to 15 minutes, until just tender.
4 medium green peppers, ¼ cup water
Brown ½ pound ground beef until cooked. Add 1 packet taco seasoning mix and ½ cup water; cook per packet instructions.
½ pound ground beef, 1 packet taco seasoning mix, ½ cup water
Stir in 1 cup sour cream, ½ cup salsa, and 1 cup cheddar cheese.
1 cup cheddar cheese, 1 cup sour cream, ½ cup salsa
Spray baking dish with Cooking spray. Generously stuff peppers with meat mixture, arrange in dish, and top with ½ cup cheddar cheese.
Cooking spray, ½ cup cheddar cheese
Bake at 350 degrees F / 177 degrees C for 20 to 30 minutes, until heated through and cheese is melted.
Serve immediately.