Thai Steak Sandwich

Ingredients

• 2 tablespoons tomato paste
• 1/2 cup fresh lime juice
• 1 1/2 teaspoons ground coriander
• 1 pound flank steak (about one-inch think)
• 1 teaspoon sugar
• 1 teaspoon salt
• 1 teaspoon red pepper flakes
• 3 cups shredded green cabbage
• 2 carrots, shredded
• 1 large red bell pepper, cut into thin slices
• 1/2 cup chopped fresh cilantro
• 1/3 cup chopped fresh mint
• 4 kaiser rolls, split