Beer Battered Fish and Chips

Name: Beer Battered Fish and Chips
Cuisine: European, British
Ingredients: 4 large russet potatoes, peeled and sliced; sunflower oil; 1/2 cup flour; 1 tsp salt; 1 tsp pepper; 1 cup flour; 2 tsp salt; 1 tsp garlic powder; 1 cup alcohol free beer; cold water; 16 oz mushrooms or vegan fish fillets or celeriac; 8 oz mushrooms or vegan fish fillets or celeriac; salt