Cheeseburger Cups – Fustini's Oils & Vinegars

Ingredients

• 1 tablespoon Fustini's Garlic olive oil, plus more for the pan
• 6 burger buns, split
• 1 medium onion, chopped
• 1 lb. ground beef
• 2 tablespoons ketchup
• 1 tablespoon mustard
• 1/2 teaspoon garlic powder
• Kosher salt & freshly ground black pepper
• 3 slices cheddar, quartered
• ketchup, for serving
• yellow mustard, for serving
• 12 pickle chips
• sesame seeds, for garnish