Trim the ends of your zucchini and slice it lengthwise into ¼-inch planks. Toss with olive oil, salt, and pepper. Grill or broil for 5-8 minutes until browned and tender.

In a skillet, heat remaining olive oil over medium heat. Add ground beef or bison, salt, and oregano. Cook for 7-10 minutes until browned. Stir in garlic and cook for 30 seconds. Mix in marinara sauce and set aside.

In a mixing bowl, combine cottage cheese (or ricotta), half of the Parmesan, egg, and seasonings. Stir in spinach until well mixed.

Preheat oven to 350°F (175°C). In a greased casserole dish, layer half of the meat sauce, half of the zucchini, and the cheese mixture. Repeat layers. Top with mozzarella and remaining Parmesan.

Bake for 20 minutes until cheese is bubbly and golden. Let cool for 10 minutes before slicing.

Sprinkle fresh basil on top before serving.