Preheat oven to 200°C (400°F).
Season chicken cubes with olive oil, salt, pepper, and garlic powder.
Roast chicken on a parchment-lined tray for 15-18 minutes until fully cooked.
Combine cottage cheese and marinara sauce in a blender; process until the texture is smooth and aerated.
Warm the sauce mixture in a small skillet over medium-low heat, incorporating the oregano.
Divide chicken into bowls and coat thoroughly with the warm cottage cheese sauce.
Top with mozzarella and Parmesan, then broil for 2 minutes until the cheese is bubbly and golden.