In a medium mixing bowl, use a fork to flake the drained canned tuna.
Add the corn kernels, diced red onion, diced green peppers (or pickles), creamy dressing, salt, and pepper to the bowl. Stir until the ingredients are thoroughly combined.
Lay the flour tortillas flat on a clean work surface. Divide the tuna salad mixture evenly, placing it in the center of each tortilla.
Sprinkle the shredded cheddar cheese evenly over the tuna salad on both tortillas.
Fold the left and right sides of each tortilla inward over the filling, then roll tightly from the bottom upward to seal.
Heat a skillet or grill pan over medium heat. Lightly coat with cooking spray if desired.
Place the tortillas in the skillet seam-side down. Cook for 2 to 3 minutes until the bottom is golden brown and sealed.
Carefully flip and cook the other side for an additional 2 to 3 minutes until golden brown and the cheese inside is melted. Serve immediately.