In a saute pan, heat a couple of tbsps of canola oil until hot and then add the shredded cabbage. Cook down until it is soft, but still has a bit of bite. You can singe it a bit, but don't let it get too browned. Set aside.
In other pan, with a couple of TBSP of canola oil,add the onions and peppers and sear at fairly high temperatures, getting some burning, then reduce and cook until not quite tender.
Cut the sausage into bite-sized pieces and add to the onions and pepper. Add the garlic as well. Continue to cook on medium, finishing the onions and peppers as the sausage warms up.
Add the tomatoes, uncut and continue to stir, letting them pop open. Add salt and pepper to taste.
Lay a bed of the cabbage on a plate and spoon the sausage/pepper/onions and tomatoes over. Eat, love and eat some more!