Brown the ground beef in a skillet over medium heat.
Scoop the ground beef into a clean bowl and add the olive oil to the pan.
Once the oil is hot, add the onion and cook until translucent, about 3 minutes. Add the garlic and cook for one minute before adding the ground beef back into the pan.
Preheat oven to 350F.
Add the seasoning to the skillet, along with the enchilada sauce, corn, black beans and diced tomatoes. Cook for 2-3 minutes.
Meanwhile, spread half the bag of Fritos along the bottom of a 9"x16" casserole dish. Top with 1 cup of shredded cheese.
Scoop the skillet mixture overtop of the cheese layer, then top with remaining Fritos and shredded cheese.