In a medium skillet add your olive oil and cook your onion and bell pepper.
Mix together the heavy cream, chicken broth, and seasonings.
To a medium to large bowl add chicken, rotel, cooked onion and bell pepper, and green chilies.
Stir well. Add the heavy cream mixture and the 1 1/2 cups of the shredded cheese. You don't want this to be too wet but not too dry. You can add more broth of cream if you feel like it needs it.
Spray the bottom of the crockpot with non-stick cooking spray. Place low carb tortillas in the bottom. Depending on the size you have, you may need to tear and piece it together. You want the entire bottom covered. Add half of the chicken mixture and top with another layer of the low carb tortillas. Top the tortillas with the rest of the chicken mixture and then the rest of the cheese.
Cook on low 3-4 hours.