Trim off the stem of the lettuce head and break off 12 individual leaves.
In a medium pan over medium heat, add in the olive or canola oil and sauté minced garlic for about 1 minute.
Add in the ground chicken and cook until it's no longer pink.
Add in ½ T chili powder, corn, black beans, and tomatoes and cook until warmed through.
Put mixture in bowl and stir in the kale and diced avocado.
In a separate, small bowl, whisk together lime juice, extra virgin olive oil, and the remaining ½ T chili powder. Pour over chicken mixture.
Spoon chicken mixture into lettuce leaves.