Receta Donna Hay's Sweet Potato, Leek and Sage Gratin

Here's my second Donna Hay recipe and it's a perfect potato dish for the holidays, although my photograph below doesn't look very Christmasy. I gave this a test run ahead of the holidays and loved the dish so much, I intend to make it for Christmas Eve Use your mandolin to slice the potatoes...if you don't have one, slice thinly. I used fontina as it's such a nice melting cheese. Wonder how gruyere would taste? Sweet Potato, Leek and Sage Donna Hay, Issue 60 40g (about 3 tablespoons) 4 leeks, cleaned and 2 cloves garlic, sea salt and cracked black 800g ( about 1 3/4 pounds; I used 2 large.) sweet potato, peeled and thinly 800g (about 1 3/4 pounds; I used 2 large Idahos, they…