Preheat oven to 190°C or 375°F

Boil or roast meat, cool and mince.

Chop onions.

Melt half butter in a pan and fry onions till pale brown.

Stir in flour, add stock gradually, stir until thick.

Blanch tomatoes, chop and add to stock.

Add seasoning and meat.

Put into greased pie dish.

Boil and mash potatoes with milk.

Spread over the meat, make a rough surface with a fork.

Dot with butter.

Bake in preheated oven for 20-25 mins.