Prick bottoms of pue shells with a fork. Brush pie shells with melted butter. Place in a 350 degree oven for 10 to 13 minutes. Until just starting to brown.

Place 1 tbs butter in a heated fry pan over medium heat. Add onion, mushrooms, rosemary, tarragon, garlic. Saute until just starting to brown. Add marsala. Reduce most of the liquid. Remove From heat and set aside.

In same pan, add bison. Season with all spices to taste. Brown well. When browned, drizzle with worchestershire and balsamic. Add mushroom mix and heat through.

Fill the 2 pie shells with the mixture. Spread potato evenly on top. Cover with 1/2 cup bernaise sauce. Place a marrow bone in the middle. Open the can of biscuits. Flatten and stretch dough so that 4 will cover the top of the pies.

When covered, drizzle more worchestershire and balsamic on the dough. Just a bit.

Bake at 375 until the biscuits on top have browned well. Let rest for 5 minutes. At the same time bake the other 2 bones.

When pie and bones are done, drizzle bones again with worchestershire and balsamic. Garnish pies and bones with chives.

Slice pie and serve immediately. Enjoy. Serve a marrow bone to each person. Use marrow as an additive. A bit wit every other bite.