Greek Meatball Bowls

For the Greek meatballs:

• ~1 lb ground beef lean
• 1 red onion grated or minced very finely, small
• 6 cloves garlic grated or minced
• 1/2 cup panko
• 1 tsp oregano dried
• 1/4 tsp cumin ground
• 6-7 mint cut finely, leaves
• 1 egg
• 2 tbsp lemon zest
• 2 tsp salt

For the serving:

• 4 cups quinoa cooked
• lemon
• 1 cup tzatziki sauce
• 2 cups grape tomatoes halved
• 1/2 cucumber sliced