Slow cooker chipolte chicken chili

Ingredients

• 1 tbsp olive oil
• 3/4 cup white onion, diced
• 1 clove garlic, minced
• 1 tsp canned chipolte chilie in adobo sauce, minced
• 1 tsp tomato paste
• 1/2 tsp chili powder
• 1/2 tsp marjoram
• 1 1/2 cups organic chicken broth
• 1 14 oz can chickpeas, rinsed
• 1 12 ounce bone-in split chicken breast (remove the skin and trim visible fat)
• sea salt
• freshly ground black pepper
• 1 cup frozen corn
• fresh cilantro, torn into pieces to taste
• 1 lime, cut into wedges
• 1 avocado, sliced
• dollop of sour cream, optional