Cut zucchini in half lengthwise, scoop out the inside into the bowl and reserve it for later.
Place zucchini boats into a baking tray, sprinkle with olive oil, season with salt and pepper and bake at 350F for 15 minutes.
Heat a tablespoon of olive oil in the frying pan, add onion, bell pepper, reserved zucchini, season with garlic powder, salt and pepper and cook stirring for 5 minutes or until tender. Remove from the heat and set aside.
Season sliced beef with coriander powder, salt and pepper. Add a tablespoon of olive oil to the same pan and increase the heat to high. Add sliced beef and oregano and fry for 2-3 minutes per side.
Load zucchini boats with cooked beef, cooked vegetables, sprinkle with mozzarella and return back to the oven for 8-10 minutes.
Serve garnished with chopped cilantro (optional).
*You can use ground beef, pork or chicken for this recipe too. You can also top with some crispy bacon bits.