Ingredients

* /2 cup plain fat-free yogurt
* 2 teaspoons chopped fresh dill
* 1/4 teaspoon salt
* 1/4 teaspoon black pepper
* 1 garlic clove, minced
* Steak:
* 1/2 cup fresh lemon juice
* 1 teaspoon dried oregano
* 1/2 teaspoon black pepper
* 2 garlic cloves, minced
* 1 (1-pound) flank steak, trimmed
* Cooking spray
* 4 (6-inch) pitas, cut in half
* 4 romaine lettuce leaves, halved
* 1/4 cup (1 ounce) crumbled feta cheese

Directions

1. Prepare grill or broiler.
2. To prepare sauce, combine first 5 ingredients, stirring with a whisk.
3. To prepare steak, combine juice and next 4 ingredients (juice through steak) in a large zip-top plastic bag; seal. Marinate in refrigerator 10 minutes, turning once. Remove steak from bag; discard marinade.
4. Place steak on grill rack or broiler pan coated with cooking spray; cook 6 minutes on each side or until desired degree of doneness. Let stand 5 minutes. Cut steak diagonally across grain into thin slices. Line each pita half with 1 lettuce leaf half. Divide steak evenly among pita halves. Spoon 1 tablespoon sauce and 1 1/2 teaspoons cheese into each pita half.