Sprinkle the chicken cube on all sides with generous amounts of salt and pepper.
Heat the oil in a large pot or Dutch oven. Add the chicken, cooking until browned on all sides, remove chicken from the pot.
Add the bell pepper, shallots, jalapeno, and mushrooms, cooking until the vegetables have softened, about ten minutes.
Stir in the garlic and ginger.
Add the beer, scraping to deglaze the pan. Add the broth, curry paste, coconut milk, chicken, and brown sugar. Allow to simmer for about ten minutes. Salt and pepper to taste.
Ladle into bowls, top with fresh basil.