Chicken Groundnut Stew

Name: Chicken Groundnut Stew
Ingredients: 2 tablespoons oil; 3 to 4 pound chicken, cut into pieces; Salt and freshly ground black pepper; 1 tablespoon butter; 2 onions, diced; 5 medium carrots or 3 cups, sliced 1/4-inch thick on bias; 4 cloves garlic, mashed; 1-inch peeled ginger; 1 1/2 cups chopped tomatoes; 6 cups chicken stock or broth, divided; 2 ounces fresh thyme leaves; 1 habenero, pierced; 1 cup smooth natural peanut butter; 2 tablespoons tomato paste; 1/2 cup roasted unsalted peanuts, chopped for garnish