Neely's Meatball Sliders

INGREDIENTS

• Kosher salt and freshly ground black pepper
• Fresh basil leaves
• Soft rolls, split horizontally
• 1/2 cup panko bread crumbs
• 4 tablespoons olive oil, divided
• s3/4 pound ground pork
• 2 large eggs
• 3/4 pound Italian pork sausage, casings removed
• 1/2 cup grated Parmesan
• 1 (14-ounce) can diced tomatoes
• 1 (20-ounce) can tomato puree
• 1 teaspoon red pepper flakes
• 6 garlic cloves, chopped, divided
• Shaved pecorino
• 1 onion, chopped
• 1/4 cup chopped fresh parsley leaves