Prepare Tuna Mixture: Drain canned tuna, then mix with Greek yogurt, mustard, lemon juice, corn, red onion, dill relish, garlic powder, and black pepper in a bowl.

Warm the Wrap: Microwave the tortilla wrapped in a damp paper towel for 10-20 seconds until pliable.

Assemble the Wrap: Place mozzarella cheese on the tortilla, add the tuna mixture, and spread evenly.

Fold & Roll: Fold the sides in, then roll tightly from the bottom up to secure the filling.

Grill the Wrap: Heat a skillet with olive oil, place the wrap seam side down, and cook for 3-4 minutes on each side until golden brown.