Keto Chicken Tortilla Soup (Instant Pot, Slow Cooker, Or Stove-Top)

Name: Keto Chicken Tortilla Soup (Instant Pot, Slow Cooker, Or Stove-Top)
Prep time: 30 min
Cook time: 18 min
Total time: 48 min
Cuisine: Mexican
Ingredients: 14.5 oz. petite diced tomatoes with juice; 1 small onion; 3 cloves garlic; 1 jalapeno (seeded and deveined if you prefer less heat); 8 Cups chicken broth; 2 1/2 Lbs. boneless, skinless chicken breasts; 3/4 Cup carrots (chopped); 1 Cup celery (chopped); 14.5 oz. diced tomatoes with green chili (I use Ro-tel); 1 tsp. ground coriander; 1 tsp. ground cumin; 1 tsp. ground black pepper; 1 tsp. chili powder; 1/4 Cup dried oregano; sea salt (to taste. I add around 1 tsp. then taste and add more as needed after cooking.); fresh lime juice (for garnish); cilantro (chopped, for garnish); avocado (sliced and pitted, for garnish); 6 - 8 Keto Tortillas (see notes below); 1/2 Cup Avocado Oil (or as needed)