Grandma Froning'S Rhubarb Pie
["1 1/4 c. sugar", "1/2 c. flour", "salt to taste", "1 1/2 c. heavy whipping cream", "1/2 c. rhubarb (1/2-inch pieces)", "1 Tbsp. vanilla"]
["Note: Fresh rhubarb is best!", "If frozen rhubarb is used, defrost prior to adding to filling.", "Canned rhubarb must be drained first and isn't as good."]
["sugar", "flour", "salt", "heavy whipping cream", "rhubarb", "vanilla"]