Make the dressing: In a small bowl, whisk the mayonnaise, sour cream or yogurt, chipotle in adobo, garlic, and lime zest until smooth. Taste and adjust the chipotle level and salt.
Prep the chicken and veggies: Add the chicken, red bell pepper, jalapeño, red onion, and cilantro to a large mixing bowl.
Season the base: Sprinkle in cumin, chili powder, smoked paprika, a pinch of salt, and a few grinds of black pepper.
Add lime and dressing: Pour in the lime juice and the chipotle dressing.
Toss gently until everything is evenly coated.
Fold in avocado: Add the diced avocado last and fold gently to avoid mashing.
Taste and adjust: Add more lime juice, salt, or chipotle sauce to your liking. If you want extra creaminess, stir in another spoon of mayo.
Serve: Spoon into lettuce cups, pile over a bed of greens, or serve with cucumber slices. For a heartier low-carb option, try it over warm cauliflower rice.
Chill (optional): For best flavor, chill 20–30 minutes to let the spices meld.