
Heat oven to 400°F. Halve zucchini lengthwise, scoop out the centers with a spoon, and chop the scooped flesh.
Brown beef with diced onion 7 minutes, drain, then add garlic, chopped zucchini, Italian seasoning, salt and pepper and cook 3 minutes. Stir in 1 cup marinara.
Spread remaining marinara in a baking dish, set zucchini boats on top, and fill with the beef mixture.
Top with mozzarella and Parmesan and bake 18-20 minutes until the zucchini is tender and the cheese is golden.
Photo: DinnerDrop