Preheat your oven to 375°F (190°C).
In a skillet over medium heat, brown the ground beef until fully cooked, then stir in the tomato puree, garlic powder, oregano, sea salt, and black pepper.
While the meat simmers, place the cottage cheese in a small blender or food processor and blend until completely smooth and creamy.
Boil the whole wheat lasagna noodles in salted water until al dente, then drain and pat dry.
In a small individual-sized baking dish, spread a spoonful of meat sauce on the bottom, followed by a piece of noodle trimmed to fit.
Layer half of the blended cottage cheese, half of the fresh spinach, and another layer of meat sauce.
Add the remaining noodle piece, the rest of the cottage cheese, spinach, and meat sauce.
Top with the shredded mozzarella cheese and bake for 20 minutes until the sauce is bubbling and the cheese is melted and golden.