8-Ball Zucchini Parmesan

Ingredients

• 1 slice French bread, torn into small pieces
• 6 eight-ball zucchini (about 1 1/2 pounds)
• 1/2 cup packed spinach leaves
• 8 basil leaves
• 2 garlic cloves, minced
• 1 small onion, peeled and quartered (about 5 ounces)
• 3/4 tsp olive oil
• 1 cup chopped plum tomato
• 1/2 tsp salt
• 1/4 cup grated fresh Parmesan cheese
• Flat-leaf parsley sprigs (optional)