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.
Heat the oil in a heavy large skillet over medium heat. Add the sausages and cook until brown on both sides, about 7 to 10 minutes. Remove from the pan and drain.
Keeping the pan over medium heat, add the peppers, onions, salt, and pepper and cook until golden brown, about 5 minutes. Add the oregano, basil, and garlic and cook 2 more minutes.
Add the tomato paste and stir. Add the Marsala wine, tomatoes, and chili flakes, if using. Stir to combine, scraping the bottom of the pan with a wooden spoon to release all the browned bits. Bring to a simmer.
Cut the sausages into 4 to 6 pieces each, about 1-inch cubes. Add the sausage back to the pan and stir to combine. Cook until the sauce has thickened, about 20 minutes.
Serve in bowls. Or, if serving as a sandwich, split the rolls in half lengthwise. Hollow out the bread from the bottom side of each roll, being careful not to puncture the crust. Fill the bottom half of the roll with sausage mixture. Top and serve sandwiches immediately.