Cut sausage and vegetables as called for in the recipe above.
Heat a large (12" skillet) cast iron skillet then add oil.
Once the oil begins to shimmer add in the onions. Stir occasionally and cook until they begin to caramelize.
Add mushrooms and pour in 1/4 cup of water. Steam will quickly rise from the pan so be careful.
Add sausage. Stir occasionally and cook until the sausage begins to release the juices.
Now stir in zucchini, cover and cook for 2-3 minutes
Toss the tomatoes, salt and pepper into the mixture. Let stand for 1-2 minutes then serve.
*This recipe can serve 4 people or you can add a bed of rice and serve 6-8 people.