1 Arrange the courgettes (zucchini) in a colander, layered with a little salt. Cover with a plate and place a weight on top. Leave for 30 minutes to extract bitter juice.
2 Rinse the courgettes (zucchini) well and place in a 30 x 20 x 5cm/ 12x8x2 inch ovenproof glass dish or a shallow 28cm/11 inch round dish. Pour over tomatoes and mix in salt and pepper to taste and chopped parsley.
3 Cover with plastic wrap, and pierce. Microwave on full power for 9 minutes, stirring once, half way through cooking. Set aside.
4 Arrange haddock steaks on a dinner plate, towards outer edge.
5 Put a knob of butter on each and sprinkle with salt and pepper.
6 Cover tightly with plastic wrap. Pierce, once, in the centre and microwave on full power for 3-3 1/2 minutes. Drain.
7 Once the vegetables have completed cooking, and standing, pour off a little of the liquid and reserve to use in a sauce or soup recipe.
8 Arrange haddock on top of vegetables. Sprinkle with cheese and garnish with olives.
9 Microwave on full power for 1-2 minutes, until the cheese has melted.