Broccoli with Mushrooms

Cut broccoli into florets. Peel thick stems and cut into slices. Blanch broccoli florets and stalks for about 3 minutes in a pot of boiling salted water, drain, rinse with cold water and drain again. Heat 3 tablespoons oil in a pan, saute onion until soft, add mushrooms and fry briefly, then add broccoli and fry for 1-2 minutes until browned. Arrange vegetables on a plate. Mix oil in a bowl with soy sauce, lemon juice and some salt to make a sauce. Drizzle the sauce over vegetables and serve.