Mushroom cheese empanadas

medium size or 20-25 small empanada discs, use homemade empanada dough for baking or store bought empanada discs

butter

to 3 cups sliced mushrooms, about 10 ounces

sliced shallots, about 7-8 shallots or 6 ounces

raisins

balsamic vinegar

grated fontina cheese, about 4 ounces

egg, white and yolk separated and lightly whisked

Dipping sauce suggestion:

Aji criollo or spicy cilantro hot sauce