Peel the potatoes, wash them, cut them into sticks and rub them dry with a tea towel. Heat the frying fat. Fry the potato sticks in portions at 150 °C for approx. 3 minutes
In the meantime peel and chop the onion. Heat the fat and fry the onion cubes in it until transparent. Add peas and stock, bring to the boil and simmer for about 5 minutes. Puree into puree with a blender. Season to taste with salt and pepper
For the batter, mix flour, starch and baking powder. Mix the flour mixture and 180 ml water until smooth. Season with 1 teaspoon salt. Wash the fish, dab dry and cut into portion pieces. Heat the fat to 180 °C. Pull the fish through the dough and bake in portions in hot frying fat for about 5 minutes. Keep finished fish warm
Fry the French fries in portions for approx. 4 minutes each, take them out and let the fat drip off. Season chips with salt. Sprinkle fish with malt vinegar or wine vinegar to taste. Arrange fish with pea puree and chips