To toast sesame seeds, add to a dry skillet over medium heat and cook about 5 minutes, stirring occasionally until toasted and fragrant. Remove from heat.
To a large bowl, add the chopped green and red cabbage, shredded carrots, chopped mint and toasted sesame seeds.
In a small bowl, add all ingredients for the Miso-Peanut sauce, plus the lime juice, and stir with a whisk until smooth.
Add sauce to the veggies and stir until coated evenly. Serve immediately. If making ahead, keep sauce separate and add immediately before serving. This recipe makes 4 cups coleslaw.