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["Heat the oil in a pan and fry the onions for 3-4 minutes until they just begin to soften.", "Add the mushrooms and cook for a further 2 minutes.", "Remove the pan from the heat and mix the rice, breadcrumbs, walnuts, egg and sauces into the vegetables.", "Season with salt and pepper and mix well.", "Shape the mixture into 6 burgers.", "I wet my hands in between burgers as this cuts down on the amount of mixture which sticks to your hands.", "Chill burgers in the refrigerator for at least 30 minutes.", "Grill burgers on an oiled rack over medium coals/heat for 5-6 minutes on each side, turning once and frequently basting with oil.", "If you don't want to use the grill, place burgers on an oiled baking sheet and bake in a fairly hot oven (around 350F) for approximately 10 minutes per side.", "Remember to baste as this will create a nice outer ""shell"" for the burgers.", "If you like, top the burgers with a slice of cheese 2 minutes before the end of cooking.", "Grill onions and tomato slices if desired or eat them fresh.", "Toast the sesame seed buns on the side of the grill or in the oven until toasted and warm.", "Serve the burgers in the toasted buns together with onions and tomatoes.", "From the ""Essential Cooking Vegetarian""."]
