✔️ Grating the onion makes the meatballs extra tender and helps them hold their shape.
✔️ If you prefer a smoother chimichurri, blend a bit longer, but do not purée completely—it should have texture.
✔️ The yogurt sauce can be made a day ahead to allow the lemon to infuse deeper flavor.
✔️ Ground beef or a beef-lamb mix also works well in place of lamb if needed.