Cook chicken with crushed garlic, pepper, and salt with 1/2 tsp olive oil, keep it shredded aside.
Toss cabbage, bell peppers, tomatoes, corn, sweet apple, chicken all together.Whisk apple cider vinegar, sugar and salt in a bowl and season it with black pepper.
Pour the dressing over the slaw and gently mix.
Cover the bowl with a wrap and refrigerate 30 minutes before use