Pork Medallions w/ Miso Sauce

Ingredients

• 1 whole pork tenderloin
• 1 shallot
• 1 clove garlic
• 1 1/2 tsp ginger
• 1 to 2 green onions
• 1/4 cup rice wine vinegar
• 1/2 tsp soy sauce
• 1 tsp genmai miso paste
• 2 tsp grapeseed oil
• sea salt, to taste
• freshly ground black pepper. to taste
• 1 1/2 cups chicken stock