Buttery Burgers Recipe

Ingredients

• 2 sticks unsalted butter (1 cup), at room temperature
• 3 Tbsp. ketchup
• 3 Tbsp. chopped red onion
• 3 Tbsp. chopped dill pickle
• 1 ½ tsp. prepared yellow mustard
• Salt to taste
• 3 lb. ground beef round
• 3 Tbsp. dill pickle relish
• 3 Tbsp. minced red onion
• 2 Tbsp. prepared yellow mustard
• 1 Tbsp. Worcestershire sauce
• 8 ciabatta hamburger buns
• Shredded iceberg lettuce
• ¼ cup each torn fresh dill and parsley leaves
• 8 tomato slices