In 10-inch skillet, cook bacon until crisp; drain on paper towels. Crumble; set aside. Reserve drippings. Spray 13x9-inch pan with cooking spray. In 2-quart saucepan, heat broth to boiling over high heat. Gradually stir in grits and salt. Reduce heat to low. Cover; simmer 5 to 7 minutes, stirring often, until grits are thickened. Stir in cheese and bacon. Spoon into pan. Cover; refrigerate 1 hour or until firm.