Place all ingredients for the patties in a medium bowl. Stir together with a fork until well combined. Form mixture into four equal patties about 3" in diameter.

Heat a 10 inch nonstick skillet over medium heat. Add a bit of olive oil, swirl to coat. Place patties in skillet. Cook first side until browned. Flip. Cook second side until browned. Took about 4 minutes per side for me.

While patties are cooking butter one side of each slice of bread you will be using. When patties are done transfer to a plate and set aside. Carefully wipe out skillet with a clean paper towel and return to heat.

Add one slice of bread to skillet, buttered side down. Layer one slice of cheese, one tuna patty, one more slice of cheese, then second slice of bread buttered side up.

When first side is browned to your liking flip. Gently press down with spatula to squish sandwich together. Cook until second side is browned to your liking. Transfer to a plate. Repeat process with remaining patties to make up to 4 sandwiches. Enjoy!