Drain bean salad; reserve 2 tablespoons liquid.
To make dressing: In small bowl, whisk reserved liquid, lime juice, adobo sauce, mustard, salt and pepper. Whisk in oil until completely combined. Stir in cilantro; set aside.
In medium bowl, combine bean salad, quinoa, chicken, onions and chipotle pepper. Add dressing; toss gently.
Divide bean salad mixture equally among lettuce cups.