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 until browned, then add onion, garlic, and zucchini; cook until softened.
Mix in tomato paste, diced tomatoes, rice, and seasonings; simmer briefly. Stir in cheese and parsley.
Prepare tomato sauce with garlic powder, onion powder, and honey. Pour around peppers.
Stuff peppers with filling, 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, garnish with parsley or basil, and serve.
Notes
For a low-carb option, use cauliflower rice and reduce cheese accordingly.