Pimiento Mac and Cheese

Name: Pimiento Mac and Cheese
Ingredients: 1 1/4 cups (packed) coarsely grated extra sharp cheddar cheese; 1 7 to 8 ounce red bell pepper, seeded, cut into 1 inch pieces; 1 cup (packed) coarsely grated whole milk mozzarella; 1/2 cup freshly grated Parmesan cheese, divided; 1/2 cup panko (Japanese breadcrumbs); 1/4 teaspoon ground ancho chiles; 2 garlic cloves, halved, divided; 3 tablespoons unsalted butter, room temperature, divided; 3/4 cup drained mild Peppadew peppers in brine, 1 tablespoon brine reserved; 8 ounces medium shell pasta or gemelli