All-In-The-Blender Salmon Mousse
["1 envelope unflavored gelatin", "2 Tbsp. lemon juice", "1 small onion, sliced", "1/2 c. boiling water", "1/2 c. mayonnaise", "1/2 tsp. dried dill", "1 (1 lb.) can pink salmon, drained", "1 c. heavy cream or yogurt", "parsley (garnish)"]
["Place first 4 ingredients in blender and blend at high speed until onion is pureed.", "Add next 4 ingredients and blend again. Add cream, 1/3 at a time and blend until very smooth.", "Pour into a 1-quart mold and chill overnight.", "To unmold, dip bottom and sides of mold into warm water and invert onto a serving plate.", "Decorate mousse with parsley."]
["unflavored gelatin", "lemon juice", "onion", "boiling water", "mayonnaise", "dill", "pink salmon", "heavy cream", "parsley"]