Fill a large stockpot half way with water and bring to a boil. Fill a large mixing bowl with ice water and set aside.
Using a sharp paring knife, cut a small X, an inch or two in length, in the bottom of each peach.
When the water comes to a boil, carefully drop in half of the peaches and allow to simmer for just a minute, or until the skin easily pulls away from the X cut in the bottom. Transfer to the ice water immediately and allow to cool for a few minutes before transferring to a large cutting board. Bring the water back to a boil and repeat with the remaining peaches.
Peel and pit the peaches (keep the skin and add to your smoothies!). Using your hand or a knife, roughly cut the peaches into 1/2 to 1 inch chunks. For ease, I simply pulled the peaches away from the pits over a bowl and used my fingers to break them up into rough pieces (you should have about 4 cups).
Mix with the remaining Peach Jam ingredients, taste, and adjust sugar, lemon juice and/or garam masala as desired (I added a touch more of all these ingredients but it will depend on the sweetness/flavor of your peaches).