Step 2. Add onions and ground beef in a skillet over medium-high heat, crumble, and cook until the beef is fully cooked. Drain extra grease.
Step 3. Then add cream cheese and green chilis to the skillet and stir until the cheese melts.
Step 4. Transfer the meat mixture to a greased baking dish and layer with shredded taco cheese and Frito corn chips.
Step 5. Place the baking dish in the preheated oven at 350°F and bake for 20 minutes or until golden.
Step 6. Once ready, take the casserole out of the oven and top with shredded lettuce and chopped tomatoes.
Step 7. Serve warm with a dollop of sour cream and salsa on top.
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