Vegetable Casserole - cooking recipe

Ingredients

1 stick margarine
1/2 c. flour
3 c. milk
1 bag frozen baby lima beans
1/2 bag frozen French-cut green beans
1 bag frozen peas
grated Parmesan cheese

Preparation

Over low heat, melt the margarine; then add the flour, mixing well.
Add milk, continuing to stir to make a smooth white sauce.