Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
                        ***GYRO PATTIES***
   1 1/4  pounds        lean ground beef
   1 1/4  pounds        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

Preparation:

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. To assemble sandwich, place 1 meat patty in each pita half and top with yogurt sauce and onion slices.