Favorite Meat Loaf Gyros Recipe 5

Name: Favorite Meat Loaf Gyros Recipe 5
Ingredients: 1 egg, lightly beaten; 6 g arlic cloves, minced; 3 tablespoons dried oregano; 1-1/2 teaspoons kosher salt; 1 teaspoon pepper; 1 pound ground lamb; 1 pound ground beef; Tzatziki sauce:; 1 cup (8 ounces) plain yogurt; 1 medium cucumber, peeled, seeded and chopped; 2 tablespoons lemon juice; 2 g arlic cloves, minced; 1/2 teaspoon salt; 1/4 teaspoon pepper; 8 whole pita breads; 3 tablespoons olive oil, divided; 16 slices tomato; 8 slices sweet onion, halved