Chop the onion and mince the garlic. Cut the bell peppers into cubes. Heat oil in a pan over medium-low, then sauté the onion and garlic for 6-8 minutes until golden brown. Add the bell peppers, sweet corn, and half of the taco seasonings. If needed, season with ground cumin or spices for heat.

Stir in the beef mince, add the remaining taco seasoning, and 1/4 cup of water. Cook for 5 minutes until the beef is done and the water evaporates. Prepare a grill or large pan and add the quesadilla filling, spreading it evenly. Top with grated cheese and cover with another tortilla.

Toast on medium-low for 2 minutes per side. Check for melted cheese and press down with a spatula. Once grill marks form, cut into four pieces and enjoy!