Pico De Gallo Grilled Cheese Sandwich
Ingredients:
-
1 tomato, diced
-
½ white onion, diced
-
2 tablespoons chopped fresh cilantro, or to taste
-
½ lime, juiced
-
salt and ground black pepper to taste
-
3 tablespoons softened butter, or as needed
-
10 slices white bread
-
10 slices provolone cheese