Greek Meatball Subs

Ingredients

• 1-1/2 pounds Ground Beef
• 4 soft hoagie rolls (6 to 7 inches long each)
• 2/3 cup plain fat free yogurt
• 1 tablespoon Greek seasoning
• 1/2 teaspoon salt (optional)
• 1/2 teaspoon black pepper
• 1 cup chopped tomato
• 1 cup chopped or sliced cucumber
• 1/4 cup Kalamata olives, chopped

Creamy Yogurt Sauce:

• 1/3 cup plain fat free yogurt
• 2 ounces feta cheese, crumbled
• 1-1/2 teaspoons Greek seasoning
• 1/4 teaspoon black pepper