Miso Mushroom Swiss Bison Burger

2 Euro-Bake Potato Bun
½ Shallot
3 ea. Button Mushrooms
1 lb. Ground Bison
1 red onion, sliced and sauteed
1 lb shiitake mushrooms, sliced and sauteed
4 slices of Swiss cheese

CHIVE MAYO
• 1 tbsp. Chives, thinly sliced
• ½ cup Mayo
• ½ cup Miso