1. Rub chicken with garlic and spices; season with salt and pepper. Heat oil in a large pot or Dutch oven over medium heat. Working in 2 batches, brown chicken on all sides, turning as needed, 6 to 8 minutes. Transfer to a plate; set aside.

2. Add onion and jalapeno to pot, and cook, stirring often, until onion is translucent, 6 to 8 minutes. Add tomatoes and sweet potato; cook, stirring occasionally, 2 minutes.

3. Add peanut butter and broth to pot; bring to a boil. Reduce heat to a simmer, and add chicken. Cover, and simmer until chicken and potatoes are very tender, 25 to 30 minutes. Serve hot.