In a pan brown hamburger and diced onion. Drain and add taco seasoning, black beans and rotel. Cover and Heat over med to low heat for about 5 min.
2In the bottom of a square 8 x 8 baking dish, spread half of the meat mixture in the bottom. Layer next about 1 1/2 cups crushed Doritos, then half the bag of mexican cheese. Next layer the rest of the meat, another 1 1/2 cups crushed Doritos and half of the bag of Cheddar Cheese. Sprinkle alittle bit of the mexican cheese over the cheddar.
3Then place in a preheated 350 degrees oven for 20 mintues. When done take out and place on top of stove let rest for about 5 min. The spread Sour cream over the top...layer the shedded lettuce next then sprinkle each of the remaining cheeses on top. Feeds about 6 give or take. Recipe can be doubled to make more in a bigger pan.