http://www.waitrose.com/recipe/Vegetarian_Cottage_Pie_with_Parsnip_and_Apple_Mash .aspx
If she's not into Quorn, replace it with a load of courgettes, peppers and mushrooms. And definitely parboil the carrots like pinkwelly76 says.
Hopefully the board isn't going to get loads of Waitrose trolls as a result of my having posted that link.