Prepare grill or broiler.
To prepare salad, combine first 10 ingredients (fennel through garlic).
To prepare burgers, combine cheese and next 5 ingredients (cheese through turkey) in a large bowl. Divide mixture into 8 equal portions, shaping each into a 1/2-inch-thick patty.
Place patties on a grill rack or broiler pan coated with cooking spray; cook 4 minutes on each side or until done.
Cut patties in half. Place 2 patty halves and 1/4 cup salad in each pita half.