Preheat your oven to 400°F and line a baking sheet with parchment paper.
Spiralize the zucchini into noodles and set aside on a paper towel to drain excess moisture.
In a medium mixing bowl, combine the ground beef, egg, almond flour, garlic powder, dried oregano, sea salt, and black pepper.
Gently mix the ingredients by hand until just combined, being careful not to overwork the meat.
Roll the mixture into 1.5-inch meatballs and place them on the prepared baking sheet.
Bake for 15 to 18 minutes until the meatballs are cooked through and slightly browned.
While the meatballs bake, warm the marinara sauce in a large skillet over medium heat.
Add the zucchini noodles to the skillet and sauté for 2 to 3 minutes until just tender.
Add the cooked meatballs to the skillet and toss gently to coat everything in the sauce.
Garnish with chopped fresh parsley before serving.