brown the meat and drain
add oil and onion saute until brown
return meat a stir in slowly pour in stock while stirring
add paste, carrots, salt and pepper
raise heat to simmer and cook until filling is thick and bubbling about 15 min
make mashed potatoes
pour meat fixings into 9" baking dish
spoon potatoes on top of mixture
bake at 350 until pots are golden brown about 45 min
sprinkle cheese on after about 20 min