Financiers with Blueberries

After making a bowl of custard I had a bowl of egg whites left over. This kind of thing probably happens to you, too. With those remaining egg whites, you can make financiers. Financiers are feather-light little cakes made with brown butter and nut flour. They are so delicious that I need to control myself not to wolf down the entire platter at once. Brown butter is also known as beurre noisette, and it’s delicious with everything: fish, for example, or steamed broccoli, or in a pila