Mushroom Pate

I chopped onion
3 Tablespoons olive oil
500 grams mushrooms
1 large chopped tomato
3 cloves garlic
salt and black pepper
1 1/2 Tablespoons tomato paste
2 Tablespoons chopped parsley
2 Tablespoons chopped chives
slices of mushrooms or olives to garnish

Cook onion gently in oil until soft
Add mushrooms over a high heat until they have wilted.
Add tomatoes and cook until soft and the liquid has evaporated.
Process to a thick paste, season well.
Stir in parsley and chives.
Add more olive oil to moisten if necessary.
Store covered in refrigerator for up to 5 days.
Cover with melted butter if desired.