Chef John's Beef Sliders

Details

Ingredients

• 1 pound ground beef
• 16 paper muffin liners
• salt and ground black pepper to taste
• 2 tablespoons mayonnaise
• 1 tablespoon ketchup
• 1 tablespoon Dijon mustard
• 1 tablespoon sweet pickle relish
• 8 slider-size burger buns, cut almost through horizontally
• 8 slices roma (plum) tomato