I do a pastry base, short crust...

Then I use

500gm mince
1 carrot grated finely
1 zucchini grated finely
3 potatoes mashed
1 cup beef stock
2 bay leaves
2 tsp worstershire sauce (sorry spelling)
1 clove garlic
2 tsp soy sauce
2 tbsp plain flour

Brown your mince, and then mix in garlic, carrot, zucchini, bay leaves, worshtershire sauce and cover, let simmer for 20-30 minutes... opps season!!! Sorry...
Take off heat. Mix together soy sauce and plain flour into a paste and add a bit of water if you need it. Take out bay leaves and mix in paste, pop back on the heat for 5 minutes or until it thickens into a gravy.

Pour into prepared pastry and top with mashed potato, If you are that way inclined, add grated cheese on top as well. Bake in 200 degree oven for 20 minutes.... there you go!