Preheat an oven to 400 degrees Farenheit. Meanwhile, in a large pan, saute the ground turkey with the salt, pepper, garlic powder, dried oregano and red chili flakes over medium heat until the meat begins to brown - break it up into small chunks with the back of a wooden spoon while it cooks.
Once the meat has begun to brown, add the chopped onion and saute for 2 minutes.
Next, add the chopped tomatoes and saute for another two minutes.
Add the tomato paste and Worcestershire sauce and stir to combine everything. Continue cooking while you prepare the zucchini by halving them lengthwise and scooping out the flesh. Add the flesh to the meat mixture and continue to cook, about five minutes.
Meanwhile, prepare the topping by combining the cheese and breadcrumbs.
Assemble the boats: season the zucchini with some salt and pepper and drizzle them with olive oil. Add the meat mixture to the boats and top with the cheese and breadcrumb mixture.
Bake for 20 minutes, until the cheese is brown and melted. Serve immediately.