Mediterranean Beef Meatballs

Name: Mediterranean Beef Meatballs
Cuisine: Mediterranean
Ingredients: 1 lb. lean grass fed ground beef; 1/4 cup oat flour (ground oatmeal); 2 Tbsps chopped fresh dill; 2 Tbsps chopped fresh parsley leaves; 2 Tbsps chopped fresh mint leaves; 1/4 cup pitted Kalamata olives, chopped; 1/4 tsp sea salt, or to taste; 1/4 tsp finely ground black pepper, or to taste; 1/2 small onion, grated; 2-3 fresh garlic cloves, minced; 1 Tbsp avocado or olive oil