Red herring salad recipe: polish sushi nordic style

Ingredients

• 4-6 herring fillets in oil, neutral, no spices, Matjes are the best,
• 1 cup cornichons (dill pickles),
• 1 medium sweet onion,
• 1 cup mushrooms in vinegar,
• 1 can (15 oz) green peas,
• 1 can (6 oz) of tomato paste,
• 1/2 cup grape seeds oil or any other neutral vegetable oil,
• freshly ground pepper.