First, if you don't have fresh peaches, you're not stuck. Frozen peaches work great, thawed and drained well. Canned peaches, drained hard and patted dry, are fine too. Apples or pears make a lovely version. Whatever you use, the rule is the same. Get the water out. Now here's the heart of it. You're not just tossing fruit in the middle of these rolls. You're making something close to a jam. Cook your peaches down with the sugar and spices until there is no free liquid left. None. Give the pan a tilt. If juice runs, it isn't ready. You want it thick enough that it sets up like a soft jelly once it cools and sits a while. The cornstarch is what gets you there. Cornstarch needs heat and moisture to do its job. As it cooks it turns from cloudy to glossy, and it locks all that loose juice into a thick, spoonable filling. That's the whole trick. It keeps setting up as it cools, so don't panic if it looks a little loose while it's hot. Just let it cool all the way before it goes anywhere near your dough. You've got two roads to get there, and both work: Roasting. Toss the fruit with the sugar, spices, and cornstarch and roast it down on a rimmed sheet until it's jammy with no liquid left on the pan. Stovetop. Cook the fruit with the sugar and spices in a saucepan. Stir your cornstarch into a splash of cold water first to make a slurry, add it in, and cook a couple minutes until it turns glossy and thick. Either way, you're after that jelly consistency inside. Runny filling is the number one reason these turn messy and the bottoms go soggy. Cook it down, cool it down, and you're set. Perfection is not required. Progress is. Henry ⭐🔥