Gyro Sandwiches

Gyro Patties:

1 1/4 pound lean ground beef
1 1/4 poun lean ground lamb
1/4 cup oregano
1 1/2 tablespoons onion powder
1 tablespoon garlic powder
3/4 tablespoon ground pepper or more
1 teaspoon thyme
3/4 teaspoon salt

Yogurt Sauce:

1 cup plain yogurt
1/4 cup finely chopped cucumber
1/4 cup finely chopped onion
2 teaspoons olive oil
garlic powder
salt and white pepper

8 large pita breads; cut in half
thinly sliced onion rings

For patties: Preheat broiler or prepare barbeque. Combine ingredients lightly but thoroughly in large bowl. Shape into 16 thin patties and broil, turning once, until done as desired.

For sauce: Combine first 4 ingredients in small bowl. Add garlic powder, salt and pepper to taste.

Fill pita with meat and spoon yogurt sauce over. Top with onion rings.