Halloween Deviled Eggs

Bahan-bahan (24 porsi)

• 12 large eggs
• 4 tablespoons white vinegar (divided)
• red & black gel food coloring
• ½ cup mayonnaise
• 1 teaspoon yellow mustard
• 1 tablespoon dill pickle juice
• ¼ teaspoon onion powder
• ¼ teaspoon salt
• 6 pimento stuffed olives (sliced)
• ½ cup sliced black olives
• 6 slices mozzarella cheese (optional)