Preheat the oven to 350, spray a 9×13 casserole dish.
Place ground beef in a large skillet, cook over medium to medium/high heat stirring and crumbling as it cooks until cooked through.
2 lbs Lean Ground Beef
Remove the cooked ground beef from the skillet to a plate lined with paper towels to drain leaving about a tablespoon of drippings in the skillet. Set aside.
Place the diced onion in the skillet with reserved drippings. Cook over medium heat for 5-10 minutes or until translucent.
1 Cup Diced Onion
Add the beef back into the pan, add in the taco seasoning, salsa and water. Stir to combine and continue heating over medium heat, stirring occasionally for 5-10 minutes or until heated through.
2 Packages Taco Seasoning, 1 Cup Salsa, ½ Cup Water
Spread the meat mixture across the bottom of the baking dish.
Spread the shredded cheese evenly across meat mixture.
2 Cups Shredded Mexican Blend Cheese
Lightly crush the Fritos and spread them across the cheese layer.
1 9 oz Bag Fritos
Place the casserole into the oven and bake for 10-15 minutes or until the cheese has melted.
Serve topped with your favorite taco toppings.
Optional Toppings- Sour Cream, jalapenos, black olives, guacamole,