Trim fat from bison and slice into thin pieces.
Mix all of the bison ingredients in a large bowl or sealed plastic bag and let marinate for an hour at room temperature.
Prep peanut sauce by adding all ingredients except water to a mixing bowl and whisking. Add hot water 1 tablespoon at a time and whisk until desired consistency (should be pourable but still thick.) Set aside.
Prep the veggies.
Bring 6 cups of water to a boil in a medium pot for the noodles.
Add water to a skillet and heat on low for the rice papers.
Prep the grill then sear the meat on each side for 2-3 minutes on high heat. Remove to a plate. Note that you want the meat to be charred on the outside with some pink in the middle.
Add noodles and remove boiling water from heat. Let sit 3-5 minutes. Strain and serve immediately or, if not using immediately, either keep noodles stored in cold water or put them on a plate and cover with plastic wrap.
Submerge a rice paper to soften for about 10-20 seconds. Once soft, transfer to a clean, slightly damp plate and gently smooth out into a circle. If you let it go too long or if your water is too hot, it will be too fragile to work with.
Add veggies, noodles, bison and cilantro/mint. Fold bottom over the fillings, then gently roll over once and fold in the side to seal, then roll until completely sealed. Place on a serving plate and top with a room temperature damp towel to keep fresh.
Repeat process until all toppings are used. Serve with peanut dipping sauce.
Store leftovers covered in the fridge for up to a couple days, though best when fresh.