Food Network teaches how to crush, slice and mince garlic. Peel off some of the papery skin from the garlic and then smash the head of garlic with the heel of your hand to loosen the cloves; if you only need a few cloves, leave the head intact and pull some off. Separate the cloves. To peel a clove, cut away the root end with your knife. Lay the flat side of the knife over the clove while holding the knife handle, then with the heel of your free hand carefully whack the knife against the garlic to separate the skin from the clove. To crush the peeled garlic, lay the flat side of the knife over the clove and smash it again. To slice peeled garlic, lay the clove flat on the cutting board and hold it with the fingertips of one hand, keeping them curled under. Using a rocking motion with the knife, make thin slices by moving the knife slowly across the clove. To mince peeled garlic, lay the flat side of a knife over the clove and smash it. Roughly chop the clove then move your free hand flat across the tip of the knife and use a rocking motion to chop the garlic until it’s finely minced.
In a large saute pan over medium heat, add 1 tablespoon oil and saute onions, bell peppers and garlic. After 2 minutes, add salt and cook until tender. Remove from pan and let cool.
In a medium bowl, pour milk over bread crumbs and let soak for 5 minutes. Remove from milk and squeeze out excess milk, until bread is moist but not soggy. In a large bowl, mix together beef, pork sausage, soaked bread, cooled vegetables, basil, oregano, parsley, pepper, chili flakes, grated Parmesan and egg. Gently roll into 2-inch balls.
In same large saute pan used for vegetables, heat over medium heat and add 1 tablespoon oil. Cook meatballs, browning completely until the internal temperature reaches 165 degrees F, using an instant-read thermometer.
Meanwhile, remove inside dough from hoagie rolls. To assemble heroes, fill hoagies with 4 meatballs each. Drizzle with 1/4 cup Marinara Sauce and top with 3 slices of mozzarella cheese. Place heroes on a sheet pan under the broiler until the cheese melts and turns golden brown. Top each sandwich with 1/2 tablespoon Parmesan.
In medium saucepan, heat olive oil, add onions and cook over medium to low heat until onions are transparent. Add garlic and cook until almost brown and then add tomatoes. Cook for 1/2 hour over low to medium heat, then add basil and oregano and continue to cook for 30 minutes longer. In a food mill or a blender, puree into a sauce. Season with salt and pepper, to taste.