Makes 3 cups
3 1/2 pds peaches (8 to 10), peeled, halved, pitted, and cut into chunks
3 cups sugar
1 tablespoon plus 1 teaspoon fresh lemon juice
Working in batches, pulse peaches in a food processor until chunky. Transfer to a small saucepan, and add sugar, lemon juice, and 1/2 teaspoon salt. Bring to a boil, stirring frequently. Boil, continuing to stir, until bubbles slow, foam subsides, fruit rises to the top, and jam sticks to a spoon when lifted, about 12 minutes. Let cool. Refrigerate until completely cooled.