Easy Tomato Aspic
["1 (15 1/2 oz.) can stewed tomatoes", "1 small box lemon Jell-O", "1/4 tsp. salt (optional)", "1 Tbsp. vinegar (1 1/2 tsp. lemon juice and 1 1/2 tsp. vinegar may be substituted)"]
["Heat tomatoes to boiling; lower heat and simmer 2 minutes. Add rest of ingredients and stir until Jell-O is dissolved.", "Chill until set."]
["tomatoes", "O", "salt", "vinegar"]