Preheat oven to 350° and line a 13x9 pan with parchment paper. Set aside.
Brown the Italian Sausage in a pan. Add to a large bowl. Add in the shredded zucchini, eggs, milk, garlic oil, coconut flour, salt and pepper. Whisk well, until combined and all the eggs are broken and mixed.
Pour into the prepared pan and top with marinara sauce in spoonfuls, spreading as evenly as possible. Bake 45-50 minutes, until middle is set. Top with basil after cooking.
Store leftovers covered in the fridge.