Mini Sage-and-Fontina Grilled Cheese Sandwiches

Name: Mini Sage-and-Fontina Grilled Cheese Sandwiches
Yield: 6 Servings
Ingredients: 3/4 cup (1 1/2 sticks) unsalted butter; 5 teaspoons chopped fresh sage plus 32 whole fresh sage leaves; 16 5x3x1/2-inch slices country-style bread, crust removed; 1 cup (packed) coarsely grated Fontina cheese (about 4 ounces); 1/4 cup (packed) finely grated Parmesan cheese