Step 1

Preheat the oven to 350 degrees Fahrenheit.

Step 2

In a large pot over high heat, add the mushroom soup, water, and canned tomatoes and bring everything to a boil.

Step 3

Meanwhile, in a skillet over medium heat, add the chopped onions and ground beef. Keep stirring until the onions are translucent and the beef is no longer pink, about 5 minutes. Drain it well.

Step 4

Add a layer of crushed Doritos to the bottom of a 9x13-inch glass casserole. Top it with an even layer of ground beef, followed by the soup mixture. Repeat until all ingredients are used up. Sprinkle shredded cheese evenly on top.

Step 5

Bake the casserole for 25 to 30 minutes, or until the cheese is bubbly. Serve and enjoy!