Preheat oven to 350. Brown the lean ground beef, drain and put back into the pan. Add sour cream, salsa, and mix. After mixed well, take tortilla chips and make first layer in a casserole dish. Add beef mixture for the next layer, and top off with a layer of shredded cheese. Continue this pattern with as many layers as you wish, then bake for 15 minutes.
I make this but use ground turkey and after browning it add a can of turkey chili. The ground turkey is usually left over from taco salad meat. I top with fat free sour cream and salsa after baking.
This looks good, but I wish there were portions of how much of each ingredient to add. I'm not sure of the nutrional information because I may add different amounts of each thing. This does look really good though.