Heat the oil in a large nonstick skillet coated with cooking spray over medium-high heat. Sprinkle the pork with Italian seasoning, salt, and pepper. Add pork, and cook 1 minute on each side or until lightly browned. Remove from pan. Add bell pepper to pan; sauté 2 minutes.
Combine the broth, tomato paste, thyme, and sage, stirring with a whisk.
Return pork to pan, and add broth mixture and artichoke hearts. Cover, reduce heat, and simmer 8 minutes or until thoroughly heated. Remove pork from pan, and keep warm. Increase heat to medium-high; cook 2 minutes or until slightly thickened. Spoon the artichoke mixture over the pork.