1 cup sour cream
1 medium cucumber, peeled, seeded, and finely
chopped or shredded and squeezed dry
½ teaspoon garlic powder
½ teaspoon fine sea salt
1 tablespoon finely chopped fresh parsley
1 tablespoon finely chopped fresh dill, or ¼ teaspoon
dried dill weed

gyro loaf

1½ pounds ground lamb or beef
¾ cup finely chopped mushrooms
½ cup diced red onions
¼ cup diced black olives
8 ounces feta cheese, cut into ¼-inch dice, plus extra
for garnish
½ cup powdered Parmesan cheese (see here)
¼ cup tomato sauce
1 large egg
1 teaspoon Greek seasoning
1 teaspoon dried oregano leaves
1 clove garlic, smashed to a paste

Diced red onions, for garnish
Diced tomatoes, for garnish

1. To make the tzatziki sauce, place all the
   ingredients for the sauce in a small bowl. Stir well. Set
   the sauce in the refrigerator to chill for 1 to 2 hours.
   (Note: It can be made up to 3 days ahead.)