Lemon Pistachio Cake

This is one of my go-to winter breakfast cakes, when there is almost no fruit to cook with and I’m getting a little tired of lemon by itself. This cake is buttery, but the richness is cut by its strong lemon flavor and the nuttiness of the toasted pistachios. It is very important to toast your pistachios to a golden brown to get that rich flavor. Another integral part of this recipe is not chopping the nuts for the topping too finely: if I could ask you to cut each nut in half and not sound