Adapted from Thomas Keller’s ad hoc at home.
*Bundling the peppercorns in cheesecloth will make it much easier to remove them from the jam later. Start by cutting a small square of cheesecloth. Place 1 teaspoon of peppercorns in the middle of the square. Fold up the corners of the square to make a pouch. Tie the top of the pouch with a piece of kitchen twine.