Extra Cheesy Tomato Bacon Melts

Name: Extra-Cheesy Tomato & Bacon Melts
Ingredients: 1 1/4 pounds campari tomatoes, sliced ½-inch thick; 3 tablespoons extra-virgin olive oil; 1/4 teaspoon kosher salt; 1/8 teaspoon freshly ground black pepper; 8 slices bacon (any variety works); 1/4 cup BelGioioso Mascarpone, divided (you can also use mayonnaise); 2 garlic cloves, minced; 8 slices country-style or sourdough bread; 2 teaspoons Dijon mustard, divided; 4 slices BelGioioso Fontina Cheese; 4 slices BelGioioso Asiago Cheese; 4 slices BelGioioso Provolone Cheese