Sweet, juicy peaches from New Mexico farmers’ markets are so much better than the often dry or under-ripe specimens from grocery stores. I like to make these little sponge cakes in a heart-shaped muffin tin or any jumbo muffin tin, which is also an easy way to transport them. Mascarpone is a mild, creamy cheese much like cream cheese but even softer. If you can’t find it, just use cream cheese mixed with a bit of sour cream. But don’t miss out on local peaches!