Spray slow cooker with cooking oil.
Line SC with baking paper. Line with the Puff Pastry, then put lid on so that the pastry don't dry out.
Fry mince & onion in frypan, you may need to drain juices if any.
Sprinkle sachet of Shepard Pie powder mix, can of mushroom soup, the 1/2 cup of water & the 1 Tbs of Worcestershire Sauce, then sprinkle on nutmeg.
When all combined, spoon into SC sprinkle a bit of the cheese on top, then go around the edges 2 rows high, with the Potato Gems.
Fold pastry over these 2 rows of Pastry. Then layer the rest of the Potato Gems in the middle. Top with the remaining cheese.
Cover with Tea towel.
Cook for for 3 Hours on high, it will come out golden but you just need to put in oven for 10 just to brown the top.
My SC is a 3.5..So you might have to just gauge time with your SC
We had this with Chips & Salad~Delishhhhhous Pie...