Heat a large nonstick skillet over medium-high heat. Add sausage; sauté 4 minutes. Reduce heat to medium-low. Add diced onion, bell peppers, and garlic; sauté 5 minutes. Add mushrooms and green onions; sauté 2 minutes.
Add water, wine, tomato sauce, and clam juice; bring to a boil. Reduce heat, and simmer 25 minutes. Add clams; cover, and simmer 5 minutes or until clam shells open. Discard any unopened clam shells.