Ingredients

• 24 meatballs
• 12 skillet with nonstick cooking spray
• 4 wheat pita breads (whole)
• 1 1/2 pounds extra beef (lean ground)
• 1 cup nonfat yogurt (plain)
• 5/8 cup yogurt
• 1 cup tomato (chopped)
• 1 1/2 cups mushrooms (sliced)
• 3/8 cup shallots (finely chopped)
• 3/8 cup salt and pepper
• 1 cup lettuce (shredded)
• 2 teaspoons prepared horseradish
• 1/4 cup parsley (chopped fresh)
• 1/4 teaspoon salt
• 1/4 teaspoon pepper