Spoil-yourself Yorkshire Wagyu fillet steak with fries and béarnaise sauce - James Martin Chef

Ingredients

• Flavourless vegetable oil, to deep-fry
• 125g unsalted butter
• 3 tbsp tarragon vinegar
• 3 tbsp white wine
• 1⁄4 tsp white peppercorns
• 1⁄2 small banana shallot, finely chopped
• 3 egg yolks
• sea salt and freshly ground black pepper
• 1 tbsp chopped tarragon leaves
• juice of 1⁄2 lemon (optional)
• 1 tbsp olive oil
• 1 x 200g good fillet steak
• 100g frozen chips