Greek-Style Lamb Pita Sandwiches with Tzatziki Sauce—Gyros | America's Test Kitchen

Ingredients

• 1 cup plain whole-milk yogurt
• 1/2 medium cucumber, peeled, seeded, and diced fine (about 1/2 cup)
• 3/8 teaspoon table salt
• 1 tablespoon juice from 1 lemon
• 1 small garlic clove, minced or pressed through a garlic press (about 1/2 teaspoon)
• 1 tablespoon finely chopped fresh mint leaves or dill
• 4 (8-inch) pita breads (see note above)
• 1/2 medium onion, chopped coarse (about 3/4 cup)
• 4 teaspoons fresh lemon juice
• 1/2 teaspoon table salt
• 1/4 teaspoon ground black pepper
• 1 tablespoon minced fresh oregano leaves
• 2 medium garlic cloves, minced or pressed through a garlic press (about 2 teaspoons)
• 1 pound ground lamb
• 2 teaspoons vegetable oil
• 1 large tomato, sliced thin
• 2 cups shredded iceberg lettuce
• 2 ounces crumbled feta cheese (about 1/2 cup)