This Blueberry Oatmeal Crumb Cake recipe is a delicious and healthy dessert that is perfect for Thermomix users who are looking for a guilt-free treat. The cake is made with whole wheat flour and oats, and is sweetened with honey instead of sugar. The blueberries add a burst of flavor and color to the cake, and the crumb topping is made with oats and coconut oil. Serve it warm with a dollop of Greek yogurt for a delicious treat.