Sprinkle the gelatin over the cold water in a bowl; let stand 5 minutes. Whisk in the boiling water until the gelatin is dissolved.

Stir together the tomato juice and next 8 ingredients in a large saucepan; bring to a boil over medium-high. Reduce heat, and simmer, stirring occasionally, 15 minutes. Pour through a wire-mesh strainer into a bowl; stir in the lemon juice and gelatin.

Pour into a 10-inch ring mold coated with cooking spray or 6 individual molds; chill 6 hours or until set.