Drain the tuna: Press out as much liquid as possible using a strainer or spoon.

Mix dry ingredients: In a large bowl, combine breadcrumbs, garlic powder, onion powder, salt, and pepper.

Add wet ingredients: Stir in the mayonnaise, egg, and Dijon mustard until fully incorporated.

Fold in flavor: Add shredded cheddar cheese and green onions. Mix well until the texture is moist but not overly wet.

Form patties: Divide the mixture into 4–5 equal portions. Shape into ½-inch thick patties.

Optional chill: Refrigerate patties for 15–20 minutes to help them hold together better while frying.

Cook: Heat butter in a skillet over medium heat. Cook patties for 3–4 minutes per side, or until golden brown and cooked through. Flip gently.

Optional cheesy finish: Add a slice of cheese on top during the last minute of cooking and cover until melted.

Serve: Enjoy hot with your favorite sides, sauces, or sandwich toppings!