Add chicken, onion, bell pepper, garlic, potatoes and carrots to the slow cooker and set aside.
In a medium mixing bowl, stir together the tomato paste, cumin, diced tomatoes (with juice), chicken broth, chicken bouillon and chopped chipotles until tomato paste and bouillon are completely dissolved.
Pour chicken broth mixture into the slow cooker and stir to combine. Cook on low for 7–8 hours, on high for 3½–4 hours, or until chicken and veggies are nice and tender.
Before serving, stir in chopped cilantro and season to taste with salt and pepper. You could also add a little more chopped chipotle chili if you like it really spicy!
Serve with additional chopped cilantro, lime wedges, grated cheese, sour cream, sliced green onions and warm tortillas, if desired.
One Last Thing
Don’t worry if the stew looks too thick when you’re pouring it into the slow cooker. The chicken will release plenty of liquid as it cooks and you’ll end up with a consistency that’s just right.