Basic Jam Recipe
Ingredients 3 pounds fruit (see options, below), cut into 1-inch chunks if large, stone fruit pitted 1 1/2 pounds sugar (3 1/3 cups) Coarse salt 2 tablespoons fresh lemon juice Preparation Stir together fruit, sugar, and 1/4 teaspoon salt in a large heavy-bottomed pot. Bring to a boil, stirring until sugar is dissolved and mashing fruit with a potato masher. Add lemon juice; continue to boil, stirring frequently, until bubbles slow, chunks of fruit show at top, and mixture clings to a spoon but falls off in clumps, 10 to 12 minutes....