In medium bowl, mix chicken thighs and curry paste; stir to thoroughly coat. In 12-inch nonstick skillet, heat 1 tablespoon of the vegetable oil over medium-high heat until hot but not smoking. Add chicken in an even layer. Cook 2 to 3 minutes, without moving, until browned. Turn chicken, and cook 2 to 3 minutes longer or until no longer pink in center. Pour chicken with drippings into small bowl, and cover with foil; wipe out pan. Add remaining tablespoon of oil; place over medium-high heat, then add cauliflower and bell pepper, and cook 4 to 5 minutes, stirring occasionally, until softened.