Ratatouille - cooking recipe

Ingredients

2 medium onions, diced
4 ribs celery, diced
1 c. fresh mushrooms or 8 oz. can stems and pieces, drained
2 cloves garlic, diced
2 small zucchini, sliced 1/2-inch thick (unpeeled)
3 tomatoes, diced
1 small eggplant, peeled and diced
1/4 c. butter
1 tsp. salt or to taste
1/4 tsp. pepper
1/2 tsp. oregano (optional)

Preparation

Melt the 1/4 cup butter in a large saucepan.
Add onion, celery, mushrooms and garlic.
Cook 3 to 4 minutes over medium heat.
Add zucchini, tomatoes, eggplant, salt and pepper.
Cover and cook 15 to 20 minutes.
Serve hot.