Combine beef, 1/4 cup Hellmann's® or Best Foods® Real Mayonnaise, Lipton® Recipe Secrets® Onion Soup Mix, 3 teaspoons garlic, oregano and rosemary in medium bowl. Shape mixture into 8 patties.** Grill or broil until done. Let stand 10 minutes.
Combine remaining 1/2 cup Hellmann's® or Best Foods® Real Mayonnaise and 1 teaspoon garlic, yogurt, cucumber and dill in medium bowl.
Slice burgers and place on pita breads with lettuce, tomato, onion and some of the sauce. Serve remaining sauce on the side. Garnish, if desired, with mint or parsley.