2 1/2 tbsp. peanut or vegetable oil
10-12 lg. mushrooms, sliced
1 med. onion, sliced into rings
1-2 med. zucchini, thinly sliced
1-2 med. yellow squash, thinly sliced
1 tbsp. soy sauce
1/4 tsp. pepper

Heat oil in a large skillet. Add remaining ingredients; stir fry over high heat about 5-10 minutes or until zucchini and squash are crisp tender.