My Grandmother's Savory Stuffed Zucchini Boats

Ingredients

• 2 large zucchinis (about 1 lb / 450 g)
• Olive oil, for drizzling
• 1 lb (450 g) ground beef (or ground turkey for a lighter option)
• 1 cup (150 g) cooked quinoa or rice
• 1 cup (150 g) marinara sauce
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 1 teaspoon dried Italian herbs (oregano, basil)
• 1/2 cup (50 g) shredded mozzarella cheese
• Salt and pepper to taste