Cook the rice according to package directions, omitting fat; keep warm.
Lightly spoon flour into a dry measuring cup; level with a knife. Combine flour and the next 6 ingredients (flour through pork) in a large zip-top plastic bag. Seal and shake to coat.
Heat 2 teaspoons oil in a large heavy skillet. Add half of pork; cook 4 minutes on each side or until done. Remove pork from pan. Repeat procedure with 2 teaspoons oil and remaining pork.
Add the vinegar to skillet, stirring to loosen browned bits. Add onion and remaining ingredients, and simmer 8 minutes or until tender. Return pork to pan; cover and cook 5 minutes or until mixture is thoroughly heated. Discard bay leaves. Serve over rice.