In a medium bowl, combine the ground Wagyu beef, egg white, nutritional yeast, garlic powder, sea salt, black pepper, and half of the dried oregano.
Gently mix the ingredients by hand until just combined, being careful not to overwork the meat, then roll into 1.5-inch meatballs.
Heat the olive oil in a large skillet over medium-high heat and sear the meatballs for 2-3 minutes per side until a golden crust forms.
Pour the tomato puree and water into the skillet, sprinkle in the remaining oregano, and reduce heat to low.
Cover and simmer for 8-10 minutes until the meatballs are cooked through and the sauce has thickened.
While the meatballs simmer, lightly steam or sauté the zucchini noodles for 2 minutes until tender-crisp.
Plate the zucchini noodles and top with the meatballs and a generous spoonful of the rich tomato sauce.