Streusel Topped Rhubarb Muffins

"This lovely Streusel Topped Rhubarb Muffins recipe is a great way to use fresh or frozen rhubarb. The yummy streusel mixture on top of each muffin adds not only a crunchy texture but a scrumptiously sweet topping! They are best served warm out of the oven but also last for many days in a container and also freeze well. Rhubarb is one of our favorite ingredients to work with and we have a huge patch of rhubarb at our house and many recipes to share with you. "