Preheat oven to 400°F. Grease 12-cup muffin tin. Heat oil in skillet set over medium heat; cook onion and garlic for 3 to 5 minutes or until softened. Let cool slightly.
Mix together ground beef, onion mixture, 1/4 cup ketchup, eggs, Parmesan, flax seeds, 1/4 cup parsley, dressing, pepper and salt just until combined. Divide into 12 portions; place each portion in prepared muffin cup.
Top each portion with 1 tsp ketchup. Bake for 20 to 25 minutes or until golden brown and meat thermometer inserted in center registers 160°F. Garnish with remaining parsley.