Combine spices in a large zip lock plastic bag. Add zucchini, onion, capsicum, mushrooms and vinegar. Seal and shake well to coat.
Lightly oil a large non-stick skillet. Add the vegetables mixture and sauté for 5 minutes or until vegetables are tender, adding a small amount of water if necessary to prevent from sticking. Remove from heat once cooked.
Stack the vegetables on a bed of mixed green lettuce.