Greek Meatballs with Tzatziki

Grate onion over a large bowl. Then add your ground beef and all of your other ingredients. Using your hands gently combine all of your ingredients. Form your meatballs and place on a foil or parchment lined baking sheet (for easy clean up). Bake at 350°F until the meatballs are golden brown on top and cooked through. (You can use a meat thermometer to ensure your meatballs have reached 165°F). Serve with lemon wedges on the side and tzatziki for dipping.