Mix together all the ingredients in a bowl except the butter and paprika. Season the mixture with the paprika and some salt and pepper to taste.
2 tbsp homemade ketchup, 1 tsp homemade or Dijon mustard, ½ tsp chopped capers, 1 small onion, 1 tsp finely chopped chives, 1 tsp finely chopped tarragon, 2 anchovy fillets, 1 tsp Worcestershire sauce, Sea salt and freshly ground black pepper, A pinch of paprika
Let the mixture stand for 24 hours in a warm place for the flavors to infuse.
After 24 hours, spoon the infused mixture into the softened butter and incorporate well.
10 tbsp good quality unsalted butter or Ghee
Take out a sheet of parchment paper and place the butter mixture in the middle.
Roll the parchment paper over to form a sausage shape with the butter and close up the ends.
Place in the refrigerator until set.