Preheat your oven to 375°F (190°C). Slice zucchini lengthwise and sprinkle with salt. Let sit on paper towels for 15 minutes to draw out moisture.

In a skillet, cook ground beef over medium heat until browned (7-10 minutes). Drain excess fat and stir in garlic powder and oregano.

In a greased baking dish, layer half of the marinara sauce, half of the zucchini noodles, half of the ricotta mixture (seasoned with salt and pepper), and half of the cooked beef. Repeat layers.

Top with remaining marinara sauce and cover with mozzarella cheese.

Cover with foil and bake for 25 minutes; remove foil and bake for another 10-15 minutes until golden brown.

Allow to cool for 5 minutes before serving.