African Chicken Peanut Stew

Name: African Chicken Peanut Stew
Ingredients: 2-3 pounds chicken legs, thighs and/or wings; 3 Tbsp vegetable oil; 1 large yellow or white onion, sliced; A 3-inch piece of ginger, peeled and minced; 6-8 garlic cloves, chopped roughly; 2-3 pounds sweet potatoes, peeled and cut into chunks; 1 15-ounce can of crushed tomatoes; 1 quart chicken stock; 1 cup peanut butter; 1 cup roasted peanuts; 1 Tbsp ground coriander; 1 teaspoon cayenne, or to taste; Salt and black pepper; 1/4 to 1/2 cup of chopped cilantro