Heat butter or ghee in the medium size skillet. Add chopped onions and cook over medium heat for 2-3 minutes. Add sliced bell pepper. Add salt, basil and freshly ground pepper. Cook stirring for 2 minutes.
Add mushrooms and zucchinis, water or vegetable broth, stir and and cook for 7 minutes uncovered.
Serve as a side dish or double and make it a main course!