In a large skillet, add the olive oil and then the sausage. Brown the sausage on medium heat. Once browned remove in to a bowl. Set aside.
Add a little olive oil to the skillet and add the onion (after cutting them into rings). Let them fry while you cut up the peppers.
Cut the peppers into strips (throw away stem and seeds), add to the skillet. Cook on medium heat for about 10-15 minutes, until the onions are soft and the peppers are limp.
Add the spices, and the stewed tomatoes. Cook on medium for another 10 minutes. Mixing well.
Add the sausage back to the skillet. Cover and cook on low or simmer for about 20 minute. Serve on hoagie rolls.
(optional) Put the oven on broil. Cut open the rolls and add all the ingredients, top with a slice of mozzarella cheese. Bake for a couple of minutes (I watch it the entire time, it easily burns), Serve