English Shepherd's Pie

• 5 potatoes
• 1 brown gravy
• 1 tomato -peas shelled (chopped)
• 450 gr beef (lean ground)
• 28 gr butter
• 18 gr tomato paste
• 3 gr parsley (chopped)
• 1 ml milk
• 1 ml worcestershire sauce
• 6 slices mushrooms (sliced)