Ingredients 4 medium/large wide zucchini (2 1/2 lbs)* 3 Tbsp olive oil , divided 1 large yellow onion , sliced into short pieces 8 small button mushrooms (6 oz), sliced 1 large red or green bell pepper , chopped into short slices (or 1/2 of a red 1/2 of a green) 3/4 lb sliced thin […]