I looked on hard peaches fruits and think about very good recipe good stewed apples. So, I made it with pretty good result.
4 medium peaches, cored and thinly sliced
1/2 cup brown sugar or sweetener in your choice (I used coconut sugar)
1 tsp. cinnamon
2 tbsp. lemon juice
Mix peaches, sugar and lemon juice in large bowl. Transfer peaches to a slow cooker, cover and cook on LOW for 1 1/2 – 2 hours, or until peaches have softened.