Note: I wanted to let members of this site know... that I have also made this pie using 2 (8 ounce) cans of crushed pineapple (drained well), and in place of the 15.25 ounce can, plus I also stirred 4 level tablespoons of ground flaxseed into the flour/sugar mixture before adding the rhubarb and pineapple. The pie tasted great, and I think the flaxseed helped to thicken the filling within the pie. Also, after the pie is made and cooled, I don't refrigerate it or any of the leftovers. I leave the pie set at room temperature, and cover it with paper towels. It keeps well on the kitchen counter for up to 2 days.