Pineapple Chicken with syrup

8 toasted English muffins or 8 croissants 1 (8 3/4 ounce) can crushed pineapple , drained, syrup reserved 2 cups cooked chicken breasts, chopped 3 ounces[...]

2 whole chicken breasts 3 tablespoons low sodium soy sauce 1 tablespoon sherry wine 1/2 teaspoon ginger 3 tablespoons oil 3 celery ribs , cut into strips 2[...]

4 boneless skinless chicken breasts (thawed) 1 (20 ounce) can pineapple slices (in juice, not syrup) 1/2 cup pineapple juice (use juice from the can above)[...]