If you're not familiar with chipotle chiles in adobo sauce, you'll find them in the Latin section of the store. The can will have several chiles inside, along with the adobo sauce. I recommend that you drain a bit of the sauce off, then dump the rest in the blender and pulse. Freeze the leftovers in 1/2 Tablespoon-sized portions--it'll last you for a while. Recipe courtesy of Cooking Light.
Dressing:
1/3 cup chopped fresh cilantro
2/3 cup light sour cream
1/2 to 1 Tablespoon chipotle chiles in adobo sauce--it's pretty spicy stuff!
1 tsp. ground cumin
1 tsp. chili powder
4 tsp. fresh lime juice
1/4 tsp. salt
Salad:
4 cups romaine lettuce
2 cups chopped roasted skinless, boneless chicken breast (about 2)
1 cup cherry tomatoes, halved
1/2 cup diced, peeled avocado
1/3 cup thinly sliced red onion
1 (15 oz.) can black beans, rinsed and drained
1 (8 oz.) can corn, rinsed and drained
Combine dressing ingredients, stirring well. Taste, and add additional chipotles if desired. Combine all salad ingredients in a large bowl, then drizzle with dressing. Toss to combine and serve immediately with tortilla chips.