Pulled Pork Sandwiches

1 can (15 ounces) crushed tomatoes in puree
1 tablespoon brown sugar
2 garlic cloves, finely chopped
1 tablespoon spicy brown mustard
Coarse salt and ground pepper
1 pork tenderloin (about 1 pound), cut into 4 pieces
1/4 cup light mayonnaise
1 tablespoon plus 1 teaspoon cider vinegar
1/4 teaspoon celery seed
1/4 head small green cabbage, shredded
4 whole-wheat rolls, split

In a medium saucepan, stir together tomatoes, sugar, garlic, mustard, and 1/2 cup water; season with salt and pepper. Bring to a boil; add pork, and simmer, covered, until tender, 18 to 20 minutes. Transfer pork to a plate to cool. Simmer sauce over medium, uncovered, until reduced by
half, about 20 minutes.

Meanwhile, make slaw: In a bowl, whisk together mayonnaise, 1 tablespoon vinegar, celery seed, and 1 tablespoon water; season with salt and pepper. Add cabbage, and toss to coat.

Shred pork with 2 forks, and return to sauce; stir in 1 teaspoon vinegar. Serve pork on rolls, topped with slaw.