Butter 4 ramekins and freeze, repeating three times for a good coating. Coat the inside of each ramekin with breadcrumbs and walnuts mix. Melt butter in a pan and add flour, stirring to create a roux, then gradually add the milk and then the grated cheese. Pour into a bowl, beat in the egg yolks, season with salt and pepper. Whisk egg whites to soft peaks, add a little lemon juice, carefully fold into the mix and pour mix into the ramekins. Put in a baking tray filled with boiling water halfway up the ramekins and cook in a preheated oven 180C/Gas 4 and bake for 15-20 mins until golden. Serve immediately.
Recipe by appetite magazine at https://www.appetitemag.co.uk/cheese-souffle/