Prepare an ice bath by filling a large bowl of water with ice. Start a medium saucepan of water to boil. Once boiling, place the peaches in batches of 3 into the boiling water for 45 seconds. Remove the peaches with a slotted spoon and place them into the ice bath. After about a minute or so when the peaches are cool enough to handle, use a paring knife to make a small cut to puncture the skin. Then use your fingers to pull off the skin in sheets.
Remove the pits, thinly slice the peaches and place the slices in a bowl. Mix the lemon juice with 1 tablespoon of water and mix it with the peach slices.
Lay peaches on parchment lined baking sheet and freeze until hard, 3 to 4 hours.
Transfer to an airtight container or plastic bag for long term storage. If using a bag, use a straw to suck out any remaining air before sealing the bag, then write a date on the bag. Store for up to 6 months.