Mix together all the ingredients for the beer marinade and marinate the steaks for between 12 and 24 hours in the fridge. Remove the steaks from the marinade after 24 hours.
Grill your steak to your personal liking. When your steak is done, let it rest.
Cook the noodles in a large pan in plenty of rapidly boiling water for 5 to 6 minutes. Drain and rinse under cold running water, and allow to cool to room temperature then chill.
Make the dressing by mixing the soy sauce, mirin, sake and spring onions, along with the sugar and wasabi.
To serve, arrange your cold soba noodles on your favourite plate, slice your beer-grilled steak and lay over the noodles.
Drizzle over the dressing and sprinkle with some freshly toasted sesame seeds.
And yes, cold beer on the side is important!