Japanese Hamburg Steak with Mushroom Sauce

Ingredients for 8 hamburgers

Hamburg
300 g veal and pork mince
300 g tofu
1 cup panko crumbs
1/2 of middle size brown onion
1 egg
1/4 tsp salt
1/4 tsppapper
1/4 nutmeg

Mushroom Sauce 
2 Shiitake mushrooms sliced
1 bunch of Shimeji mushrooms
1/3 cup of Mentsuyu
1 cup of water
2tbs Katakuriko(potato starch)
2tbs water

Read the Instructions here