Preheat your oven to 375°F (190°C).
Slice the zucchinis in half lengthwise and scoop out the center using a spoon to create boats. Leave about 1/4 inch of flesh around the edges.
In a mixing bowl, combine the cottage cheese, half of the mozzarella cheese, Parmesan cheese, garlic powder, onion powder, Italian seasoning, salt, and pepper. Mix well until all ingredients are fully incorporated.
Spoon the cheese mixture into each zucchini boat, pressing it down gently to pack it in.
Place the stuffed zucchinis on a baking sheet lined with parchment paper. Drizzle olive oil over the tops of the boats and sprinkle the remaining mozzarella cheese on top.
Bake in the preheated oven for 25-30 minutes, or until the zucchinis are tender and the cheese is bubbly and golden.
Remove from the oven and let cool for a few minutes. Garnish with chopped parsley if desired before serving.