Ground Beef Gyros

INGREDIENTS

• 1 (8 ounce) container plain yogurt
• 1/3 cup chopped seeded cucumber
• 2 tablespoons finely chopped onions
• 1 garlic clove, minced
• 1 teaspoon sugar
• 1 lb lean ground beef (I use ground turkey)
• 1 1/2 teaspoons dried oregano
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon salt (optional)
• 3/4 teaspoon pepper
• 4 pita breads
• 3 cups shredded Lettuce
• 1 large Tomato, chopped
• 1 small onion, chopped