Place toasted and cubed bread in a large bowl. Heat milk and butter and pour over bread cubes; let stand for 15 minutes. Mix eggs, sugar, cinnamon, salt, and rhubarb together; and combine with bread cubes.
Pour into a greased, 3-quart casserole dish and bake at 350 degrees for 45 minutes. Serve warm or cool with whipped topping.
Recipe Notes
*Cinnamon-raisin bread is a tasty option for this recipe.
Recipe courtesy of Karen Simonis, Black River Falls, WI.