Line the pie pan with the crust and crimp the edges. If you want to blind bake your crust to help it get a little more color, do it now. (This is optional. Do whatever you need to get a golden brown crust.).
In a small bowl, whisk together the flour and sugar. Add the eggs and whisk thoroughly. Add the cream and whisk some more.
Dump the diced rhubarb into the pie shell, pour the cream mixture over top, and bake the pie at 375 F for about 30-45 minutes. You’ll know it’s done when the center of the pie no longer jiggles when you wiggle the pan and the crust is golden brown on the edges and bottom.
Cool to room temperature and then chill in the refrigerator before serving.