Cook the green and lima beans following package directions.
Do not overcook.
Meanwhile, cook onion about 2 minutes in heated butter in a large skillet.
Add zucchini and toss until slices are well coated.
Cover, and cook about 15 minutes, stirring occasionally.
Mix in parsley, and then the cooked green beans and limas with their sauces.
Season to taste with seasoned salt or pepper.
Spoon into a warm serving dish.