Heat the olive oil in a large Dutch oven or pot over medium-high heat. Add the onion and cook, stirring, until softened, about 5 minutes. Add the bell pepper, jalapeño, garlic, five-spice powder and chili powder and cook for 3 minutes. Stir in the squash
pieces, chicken pieces, tomatoes, beer, cocoa powder and brown
sugar. Bring the mixture to a boil, stirring, then reduce the heat and simmer for 20 minutes.