Chicken Lettuce Wraps

I was telling my sister that I try so hard to make the meals look pretty in picture, still learning that part! Just read the recipe names and ingredients to decide if you want to cook it!!
4 chicken breast halves (frozen ok)
1/2 chopped onion
1/4 cup soy sauce
1/4 cup white vinegar
1/2 tsp ground ginger
2 TBS balsamic vinegar
Garlic powder
dash of all spice
Lettuce
- Toppings, I use:
Corn
Black beans
Shredded carrots
Rice
Chow Mein noodles
Avocados
Tomatos
Shredded cheese
Peanut Sauce or Ranch
-Put chicken in crock pot with onions and sprinkle a little garlic powder. Mix everything else together adn pur sauce over chicken. Cook on low 6-8 hours or high 4-6 hours, stirring occasionally. Shred chicken 30 min before serving.
(My crockpot cooks fast, I cook on low for 5 hours and that's plenty, otherwise the taste is way too strong and chicken is overcooked.)