This summer I have been doing Julia's blueberry greek yogurt cake and we love it! It's light and fruity, perfect for the summer.
Beat 50g soft butter with 125g sugar. Mix in 1 egg, 150g greek yogurt and a splash of vanilla. Incorporate 125g flour + raising agents. Place in an ovenproof dish, put the 200g blueberries on top (or fold them in) and bake for 25-35 minutes at 180°C.