Paleo Beef and Sweet Potato Stew

Name: Paleo Beef and Sweet Potato Stew
Ingredients: 12 ounces sweet potatoes, halved lengthwise; 4 fresh sage leaves; 2 sprigs thyme; 1 sprig rosemary; 4 pieces uncured, nitrate-free bacon, cut across in 1/4-inch strips; 1 1/2 pounds stewing beef, cut into 2-inch chunks; Sea salt and freshly ground black pepper; 4 cups unsalted chicken broth; 2 cups 1-inch diced onions; 1 cup 1-inch sliced carrots; 1 cup 1-inch sliced celery; 1 tablespoon tomato paste; 5 cloves garlic; 2 tablespoons cashew butter; Fresh flat-leaf parsley leaves, for garnish