Coat a Dutch oven with cooking spray; place over medium-high heat until hot. Add pork and onion; cook 5 minutes or until pork is browned, stirring frequently.
Add tomato and next 9 ingredients to pan. Bring to a boil; cover, reduce heat, and simmer 40 minutes.
Combine flour and water; stir until smooth; add to stew. Cook, stirring constantly, until thickened.