Preheat the oven to 400 degrees F and line a baking sheet with parchment paper. In a large bowl, combine the turkey, almond milk, almond flour, parsley, egg, onion, 1/2 cup cereal crumbs, half of the garlic and 1 teaspoon salt. Shape into sixteen 1-inch balls and place on the prepared baking sheet; bake for 15 minutes.
Meanwhile, in a large saucepan, bring the tomatoes and basil to a simmer, stirring occasionally; season with salt. Submerge the meatballs in the sauce; bring to a simmer and cook, covered and stirring occasionally, 15 minutes.
Meanwhile, heat the olive oil in a small skillet over medium heat. Add the remaining 1/2 cup cereal crumbs, remaining garlic and 1/4 teaspoon salt. Cook until toasted, about 2 minutes.
To eat now: Divide the spaghetti and meatballs among 4 shallow bowls and top with the garlic crumb topping.
To freeze and eat later: Divide the spaghetti and meatballs evenly between two 6-cup glass baking dishes and top each with the garlic crumb topping. Cover with a tight-fitting lid and freeze up to 1 month. To thaw, place in the fridge overnight. Cover with foil and bake in a 400 degree F oven until heated through, about 20 minutes.