Tuna-Stuffed Mushrooms

2 (3 ounce) cans white tuna in water, drained

2 (1 ounce) slices Swiss cheese, diced

2 tablespoons mayonnaise

1 ½ teaspoons sweet pickle relish

¼ teaspoon dried minced onion

¼ teaspoon onion powder

salt and ground black pepper to taste

1 (8 ounce) package fresh white mushrooms, cleaned and stems removed

Preheat an oven to 350 degrees F (175 degrees C).

Combine the tuna, Swiss cheese, mayonnaise, sweet relish, dried onion, onion powder, salt, and pepper in a large bowl. Fill mushroom caps with the tuna mixture; place on baking sheet.

Bake in preheated oven until the mushrooms are soft and begin to give up their juices, 20 to 25 minutes.