Cheesy Zucchini Casserole - cooking recipe

Ingredients

1 (.35 oz.) pkg. dried porcini mushrooms
2/3 c. boiling water
6 to 7 medium-size zucchini (about 3 1/2 lb.)
6 Tbsp. olive oil (as needed)
1 medium-size onion, chopped
2 ribs celery, chopped
1 lb. ground chuck
2 cloves garlic, chopped
2 oz. Prosciutto, chopped (about 1/2 c.)
1 c. bottled marinara sauce
1 Tbsp. tomato paste
1 tsp. dried oregano
1 bay leaf
3/4 to 1 tsp. crushed red pepper flakes
1 c. grated Parmesan cheese

Preparation

Heat oven to 450\u00b0. Place dried mushrooms in small bowl. Cover with the boiling water. Let soak for 30 minutes or until the mushrooms have softened. Strain mushrooms, reserving liquid. Chop the mushrooms