This healthy and delicious cake is a perfect dessert for any occasion. The cake is made with a moist and tender crumb, infused with the sweet and tangy flavors of strawberry and rhubarb, and topped with a creamy yogurt frosting. To make the cake, cream together butter and sugar, then add eggs and vanilla. In a separate bowl, mix together flour, baking powder, and salt. Add the dry ingredients to the wet mixture, alternating with yogurt. Fold in the strawberry rhubarb mixture, then pour the batter into a greased baking dish. Bake until golden brown, then let cool before frosting with the yogurt frosting. Decorate with fresh strawberries and rhubarb for a beautiful presentation.