This Strawberry Rhubarb Muffin Cake is a delicious and easy breakfast or brunch recipe that is perfect for feeding a crowd. The cake is moist and tender, with a sweet and tangy filling of fresh strawberries and rhubarb. The streusel topping adds a nice crunch and texture to the cake. To make the cake, simply mix together the dry ingredients, cream the butter and sugar, and then add the eggs and vanilla. Pour the batter into a greased baking dish, top with the fruit filling and streusel topping, and bake for 35-40 minutes. Serve warm with a cup of coffee or tea.