Italian Meatball Sandwich | RICARDO

Ingredients

• 1/2 lb (225 g) lean ground beef
• 1/2 lb (225 g) lean ground pork
• 1/4 cup (60 ml) breadcrumbs
• 1 egg
• 1 teaspoon (5 ml) Dijon mustard
• 1 teaspoon (5 ml) paprika
• 1/4 teaspoon (1 ml) garlic powder
• 1/4 cup (60 ml) olive oil
• 1/2 lb (225 g) white button mushrooms, sliced
• 1 red bell pepper, seeded and diced
• 1 onion, chopped
• 2 cloves garlic, finely chopped
• 2 cups (500 ml) homemade or store-bought tomato sauce
• Salt and pepper
• 4 submarine rolls, about 8-inch (20-cm) long
• 8 slices provolone cheese
• 2 cups (500 ml) thinly sliced iceberg lettuce