margarine in pan or wok. Add onions and toss gently for 3-4 minutes
until beginning to soften. Add mushrooms and continue tossing until they
darken evenly. Add tomatoes and very gently toss until they are heated
through. Sprinkle with black pepper.
To vary -
substitute small white or pearl onions with 2cm (3/4 in) lengths of
spring onion (shallots).