Cheese-Topped Zucchini - cooking recipe

Ingredients

3 medium zucchini
1 medium onion, sliced thin
1 Tbsp. salad oil
1/2 tsp. crushed oregano
1 (8 oz.) can tomato sauce
1 (8 oz.) pkg. Mozzarella cheese
grated Parmesan cheese

Preparation

Cut zucchini in half lengthwise.
In a large skillet, cook onion in hot oil until tender, but not browned.
Add zucchini halves, cut side up.
Sprinkle with salt, pepper and oregano. Pour tomato sauce over.
Cover.
Cook just until tender, about 10 minutes.
Top zucchini with Mozzarella cheese slices.
Sprinkle with Parmesan cheese.