In large saute pan, brown sausage links until partially cooked through. Remove from pan onto cutting board. Drain grease. Add onions and peppers to the pan, being sure to keep them separate (you may need a bit of olive oil at this point). Sauté over medium heat. While vegetables are cooking, slice sausages into half inch segments. Make room for them in the pan, and add back in to finish cooking. When everything is mostly cooked through, pour the can of tomato sauce into the middle of pan. Then add a half cup of water. Simmer until everything is thoroughly cooked and flavors meld.
Put garlic and olives into a serving bowl.
To serve: Scoop a generous cup of rice into a plate or bowl. Select your toppings from the saute pan, plus add garlic pieces and olives if desired.