Slice spam into three separate sections.Spread sweet potatoes between sections of Spam. Spam on the bottom and top with sweet potatoes inbetween. Place on a 9 inch baking dish.
drain peaches, and reserve juice. Surround spam sweet potato loaf with peach slices. Top loaf with a fan of peaches.
mix mustard with peach juice and drizzle on top of laof.
Bake in a 400F oven for 30-35 minutes