heat oil in skillet, ads garlic , cook one minute, add beef , brown , add seasonings, cook for about 10minutes, or untill fully cooked

cube tomatoes and onions. chop up about half of your cilantro, and add, also add salt to taste, mix well

in a baking dish layer doritos, meat , and onion mixture, layering with sour cream ,repeat until completly filled, in the last layer sprinkle with cheese

bake at 350º, untill cheese is melted, Enjoy ! :)