Anything goes, really.
Cut the cabbage, tomatoes, onion, and bell pepper into bite-sized pieces.
Heat olive oil in a pot and sauté the onions.
When the onions become translucent, add the remaining vegetables and sauté.
When the vegetables are slightly cooked, add tomato sauce and water.
Season with bay leaf, salt, and pepper.
Simmer until the vegetables are well cooked.