Grandma Sarah's Homemade Meat Pie

Preheat oven to 160C or gas 6
400g/1Lb of lean minced steak/lamb/pork
1 large or 2 small or a packet of ready prepared onions
1 or 2 slices of bread
Gravy granules/stock cubes
1heaped teasp cornflour or flour
salt and pepper to taste
egg wash
bake for 20/25 mins