For best results, use ripe but still slightly firm peaches so they hold their shape on the crostini, and slice them thinly for easier biting. If your goat cheese is very tangy, you can add an extra teaspoon of honey for balance, or substitute half the goat cheese with cream cheese for a milder flavor. Toast the bread just until crisp but not rock-hard so it stays crunchy without scratching the palate. Assemble the crostini close to serving time so the bread doesn’t soften, and if making ahead, keep components separate and put them together at the last minute. Feel free to swap pistachios with toasted almonds or walnuts, and adjust the balsamic glaze amount to taste, as a little goes a long way against the sweetness of the peaches.