Greek Stuffed Hamburgers

INGREDIENTS

• 2 lbs 90% lean ground beef
• 1/2 cup feta cheese, crumbled
• 1/2 cup Tomato, chopped
• 2 tablespoons red onions, chopped
• 2 tablespoons ripe olives, chopped
• 1 tablespoon olive oil
• 1/4 teaspoon dried oregano
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 6 whole gyro style pita bread (6 inches)
• 6 lettuce leaves
• 6 slices Tomatoes
• 1 small seedless cucumber, sliced
• 1/3 cup cucumber ranch salad dressing