You can pour only part of the sauce over the steak and do as follows with the rest: Pour into a small frying pan and reduce it over a high flame. When it becomes a little thicker and syrupy, mix the sautéed onions and mushrooms into it. Remove from heat and then pour over steak. This gives the veggies a caramelized taste. Another option is to grill the steak with salt and pepper until done. Heat all sauce ingredients until bubbly. Remove from flame and stir in the non-dairy whipping cream. Serve on the side near the steak.