01 - In a medium mixing bowl, combine cranberries, jalapeño, red onion, cilantro, lime juice, granulated sugar, and salt. Mix thoroughly and allow to sit for 10 minutes for flavors to develop.
02 - Taste the salsa and modify seasoning as needed, adding additional sugar for milder tartness or more lime juice for increased tang.
03 - Place endive leaves neatly onto a large serving platter.
04 - Spoon 1 to 2 teaspoons of cranberry jalapeño salsa into each endive leaf.
05 - Serve immediately, or refrigerate salsa for up to 2 hours and assemble boats just prior to serving.