Slice tops off peppers, remove seeds, and trim bottoms if needed. Brush with olive oil and place in baking dish.
Cook ground meat in a skillet, add onion, garlic, and zucchini; cook until softened. Mix in tomato paste, tomatoes, rice, and seasonings; simmer briefly.
Stir in half the cheese and parsley. Prepare tomato sauce with garlic powder, onion powder, and honey.
Pour sauce around peppers, fill with meat mixture, cover with foil, and bake at 375°F (190°C) for 30 minutes. Uncover, add remaining cheese, and bake 5–10 minutes until bubbly.
Let rest for 5 minutes, then garnish with parsley or basil before serving.
Notes
For a low-carb option, use cauliflower rice instead of regular rice.