How about this one - its yummy.

Sweet potato topped lamb caserole.
ingredients:
Topping
approx 1 kg sweet potato
2 tbs light sour cream
2 tbs grated cheese
1 tbs chopped fresh parsley
Caserole
lamb
1 med leek
1 med eggplant
1 clove crushed garlic
1/3 cup beef stock (or more if req)
1/4 cup tom paste
1 tps chopped fresh thyme

toss lamb in seasoned flour
cook in batches until browned all over
cook leek, eggplant and garlic in same pot (approx 5 min)
return lamb to dish with stock, tom paste and thyme and bring to boil
bake covered in oven about 1 hr or until lamb is just tender

Sweet pot topping
steam or boil until tender, and drain
add cheese, parsley and sour cream and mash (or use food processor) really well until smooth

Spoon sweet potato topping over lamb mixture (to make it look a bit nicer you can spoon the sweet pot mixture into a piping bag and use the star fitting and top the caserole this way)
bake uncovered in oven until browned lightly

Its lovely and family friendly too.