Cheesy Nacho Dip

1 pound ground beef
1/4 cup chopped onion
1 package taco seasoning
1/4 cup bottled taco sauce
1 (14 ounce) bottle mild salsa
1 cup sour cream
8 ounces cream cheese, softened
Chopped tomatoes
Chopped green bell pepper
2 cups shredded mild Cheddar cheese

Brown beef and onion. Drain well. Add taco seasoning, taco sauce and salsa. Pour into a 9 x 13-inch casserole dish. Cover with sour cream and cream cheese mixed together. Sprinkle with tomatoes and green pepper, as desired. Cover with grated cheese. Bake at 350 degrees F until bubbly and cheese is melted.

Serve with nacho chips.