Osso Buco-Style Chicken Thighs

To prepare chicken, heat 2 teaspoons oil in a large nonstick skillet over medium-high heat. Sprinkle chicken with 1/4 teaspoons salt and pepper. Add chicken to pan, cook 4 minutes on each side or until browned. Remove chicken from pan. Heat 1 teaspoons oil in pan over medium-high heat. Add onion, carrot, celery and 2 garlic cloves. Cover and cook 5 minutes or until tender, stirring occasionally. Stir in wine, scraping pan to loosen browned bits. Stir in 1/2 teaspoons salt , tomato, basil, and rosemary, bring to a boil. Cover, reduce heat to medium low and cook 15 minutes. Return chicken to pan. Cover and simmer 35 minutes or until chicken is done. Uncover and cook 5 minutes or until tomato mixture thickens.
To prepare polenta; combine milk and broth in a medium saucepan; bring to a boil. Remove from heat; gradually add instant polenta, stirring constantly with a whisk. Cover and cook over medium-low heat for 2 minutes. Remove from heat; stir in cheese and 1/4 teaspoons salt.
To prepare the gremolata; combine parsley, lemon rind and 1 garlic clove. Serve chicken mixture over polenta; sprinkle with gremolata.