Homemade Tartar Sauce

Ingredients (11)

• 3 tbsp onion
• 3 tbsp cornichons
• 1 tbsp capers
• ½ cup mayonnaise
• 2 tsp lemon juice
• 1 tsp Dijon mustard
• 1 tsp distilled white vinegar
• ½ tsp Worcestershire sauce
• ½ tsp Cornichon juice
• black pepper
• 1 tbsp flat-leaf parsley