Combine bulgur, tomato, and lemon juice in a small bowl.
Bring broth to a boil and pour over bulgur mixture. Let stand 30 minutes or until liquid is absorbed.
Combine bulgur mixture, lamb, and next 6 ingredients in a medium bowl. Divide lamb mixture evenly into 6 (1/2-inchthick) patties. Place patties on a broiler pan coated with cooking spray; broil 4 to 5 minutes on each side or until desired degree of doneness.
Top bottom half of each bun with a lettuce leaf; add burgers. Spoon Feta- Cucumber Raita evenly over burgers; top with remaining half of bun.