In regards to the dip, some hoisin sauces are thicker than others. Adjust the water amount in the recipe to your desired dip consistency.
Heat frying pan on medium high heat and cook chicken until fully cooked through and nice crispy outside edge. Slice in chicken in thin slices, about 1/4-1/2 inch wide for rolling.
Gather chicken, sliced avocado, lettuce, herbs, vegetables, rice paper, a cutting board or surface to roll on, and a large bowl of warm water (about bath temperature).
On the 1/3 section of the rice paper wrapper closest to you, start layering your fillings of lettuce, herbs, chicken, avocado, and vegetables (use the lettuce and herbs to prevent the firmer vegetables from poking through the rice paper).