Quince are not usually raised commercially, so you won’t find many picture-perfect specimens. Expect a few bruises and scrapes, but avoid fruits with soft, dark spots. Like pears, quince ripen from the inside out, so later in the season, you might find fruit that’s past its prime when you cut them open. I look for firm quince and lift them to my nose; if they have a nice fragrance, there’s a good chance they’re good candidates for poaching. Some recipes advise soaking the peeled quince slices in lemon-tinged water to avoid browning. I’ve never done that, but instead, I simply slip them into the warm poaching liquid and any trace of discoloration soon disappears. Of course, this recipe can be halved, or increased.