Preheat your oven to 375°F (190°C).
In a skillet over medium heat, brown the ground beef until fully cooked, breaking it into small crumbles.
Add the minced garlic to the beef and sauté for 1 minute before stirring in the marinara sauce, sea salt, and black pepper.
While the sauce simmers, boil the whole wheat lasagna noodles in salted water until al dente, then drain and cut into halves or thirds to fit your baking dish.
In a small bowl, combine the ricotta cheese, beaten egg, and dried oregano, mixing until the texture is smooth and well incorporated.
Thinly slice the zucchini into rounds or long strips to act as a vegetable layer within the lasagna.
In a small individual-sized baking dish, spread a thin layer of meat sauce on the bottom, followed by a layer of noodles, a layer of zucchini, and a portion of the ricotta mixture.
Repeat the layers until all ingredients are used, finishing with a final layer of meat sauce and a sprinkle of shredded mozzarella cheese.
Bake for 20 to 25 minutes until the cheese is melted and the edges are bubbling and golden.
Let the lasagna rest for 5 minutes, then garnish with freshly chopped parsley and serve.