Preheat the oven to 375 degrees F.
Spray a 9x13 pan with cooking spray.
In a large frying pan, sauté the ground beef with the chopped onion. When almost done, stir in the minced garlic and sauté for 1 minute. Pour off any grease.
Add the chili powder, cumin, oregano and salt and pepper.
Stir in the evaporated milk, diced tomatoes, green chilies, hot sauce and beef bouillon.
(This will be soupy, but the liquid will soak up while it’s baking). Using a large slotted spoon, spread 1/2 of the meat and tomato mixture over the bottom of the 9x13 pan.
Without opening the Dorito chips bag, slightly crush the chips.
Divide chips equally and spread ½ of the chips on top of the meat. Sprinkle on 1 cup shredded cheese over chips.
Make another layer of meat and chips, then moisten the top chip layer with whatever liquid is left in the frying pan.
Top with cheese and bake for 14 or 15 minutes, until bubbling. Don’t let the chips burn.
Garnish with cilantro, or chopped lettuce, and chopped tomatoes, optional.
Serve with sour cream, salsa and hot sauce to taste.