Pre-heat your oven to gas mark 6 and bring a pan of water to the boil. Peel and chop your sweat potato into chunks no thicker than 2 inches. Place these into the boiling water and cook for 10mins or until soft enough to mash.

In the meantime, spray a large pan with a little of the low fat cooking spray and brown the turkey mince on a medium heat. When it has cooked through add the vegetables (chopped) and let them cook for five minutes before adding the garlic and Italian seasoning. Cook for five minutes before adding the chopped tomatoes and spinach. Allow this to simmer for 5 to 10 minutes which mashing the sweet potato.

Mash the sweet potato in the same way you would normal potatoes though without the addition of butter or milk. Season the mash with salt and pepper.

Place the mince into a large casserole dish and top with the mash. Place into the centre of your oven and cook for another 20-25mins or until the top has begun to turn golden and crisp.