1. Combine vinegar, sugar, and salt in a saucepan and bring to a boil, stirring to dissolve sugar; remove from heat and let cool 10 minutes.
2. Meanwhile, combine cabbage, bell pepper, carrot, and red onion in a large bowl. Pour brine over top and toss continuously for 1 minute, then transfer to a colander to drain. (Discard brine or save for another use.)
3. Return cabbage mixture to bowl and add basil, olive oil, sunflower seeds, and black pepper, then toss again before serving.
Source: Hannaford fresh Magazine, July-August 2021