For the meatballs:

• 1 lb ground beef or lamb
• 1/4 cup finely chopped red onion
• 2 cloves garlic (minced)
• 2 tablespoons chopped fresh parsley
• 1 teaspoon dried oregano
• 1/2 teaspoon ground cumin
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 egg
• 1/4 cup breadcrumbs

For the bowls:

• 2 cups cooked white or brown rice
• 1 cup chopped cucumber
• 1 cup cherry tomatoes (halved)
• 1/2 cup sliced red onion
• 1/4 cup kalamata olives (pitted and halved)
• 1/4 cup crumbled feta cheese

For the tzatziki:

• 1/2 cup plain Greek yogurt
• 1/4 cup grated cucumber (squeezed dry)
• 1 teaspoon lemon juice
• 1 teaspoon olive oil
• 1 small garlic clove (minced)
• Salt and pepper to taste