Sweet Potato Hash Quiche

I'm playing catch-up this week, so thought I'd post a long-forgotten quiche recipe. I use the same basic ingredients for making the egg/milk mixture, but change up the vegetables and cheese choices. This one included (already-cooked) grated sweet potato, softened spinach and Gruyere. 

P.S. Having some frozen pastry shells around helps a ton! While the quiche can take 45 minutes (or more) to bake, depending on how watery the vegetables are, having the pre-made crust at least makes that part simple.