To prepare dressing, combine first 7 ingredients, stirring with a whisk.
To prepare salad, place lentils in a large saucepan; cover with water to 2 inches above lentils. Bring to a boil; cover, reduce heat, and simmer 18 minutes or until just tender. Drain. Place lentils in a large bowl; stir in dressing, bell pepper, fennel, onion, and 2 tablespoons parsley. Sprinkle 1 tablespoon parsley over top of salad. Cover and chill at least 1 hour.