Heat olive oil in a large pot over medium-high heat. Add the onions and saute 3-4 minutes or until softened. Add the bell pepper, garlic, jalapeno, and cilantro; saute for another minute.: The sound of oil when it first warms is subtle, then it shimmers indicating the surface is ready to give the onion a gentle sizzle. You want the pan hot enough to soften without browning too fast, which brings a sweet aroma rather than bitter char. If the oil smokes, lower the heat right away, because burned oil will taint the soup. Listen for a steady sizzle when you add the diced onion , that tells you the pan is at the right temperature and the aromatics will sweat out their natural sugars.
Add the remaining ingredients to the pot and simmer for 15 minutes on low-medium heat. Remove the chicken from the soup and shred or dice into small bite-size pieces. Return it to the pot and stir to combine.: As the onion softens you'll notice it turn translucent and release a mellow sweetness. The kitchen will fill with a comforting savory scent, and the texture will shift from crisp to tender under a wooden spoon. Avoid rushing this stage, because undercooked onion gives a raw edge, and overcooked onion becomes mushy and loses nuanced flavor. Stir often so pieces cook evenly and don't stick to the pot.
Spoon soup into serving bowls and top with tortilla strips, avocado, sour cream, lime, fresh cilantro, or toppings of choice!: In this short burst, the minced garlic and jalapeno will release sharper aromatics that brighten the base, while the bell pepper softens slightly. The cilantro added here loosens its oils and adds a fragrant lift. You should smell a spicy, herbal pop that complements the sweet onion. Be cautious because garlic browns quickly and turns bitter; lower the heat if it starts to darken.
To Cook in the crockpot: Place all ingredients except the heavy cream and cheese in the crockpot and cook on low for 6 hours. Remove chicken and shred. Return the chicken to the crockpot along with the heavy cream and cheese and simmer until the cheese is melted.: When you add the canned tomatoes, drained black beans, corn , spices, and chicken broth , the pot will go from aromatic to deeply savory. Bring to a gentle simmer so the flavors have time to meld; small bubbling is perfect. The tomatoes will break down and color the broth, while the chicken will poach and pick up the spice notes. Rapid, rolling boils can toughen the chicken and evaporate liquid too quickly, so keep the heat modest. You want the broth to reduce slightly and concentrate in flavor over the 15 minute simmer.
Remove the chicken from the soup and shred or dice into small bite size pieces: After the poach, the chicken will feel firm but tender when pierced; the juices should run clear. Pull it out and let it rest a few moments so it is easier to handle, then shred or dice into uniform, bite size pieces. The texture of shredded chicken integrates into the broth better, while diced pieces give distinct bites. If you leave the meat in the pot while shredding, the heat can overcook it and make it stringy.
Return it to the pot and stir to combine: Once the shredded or diced chicken is back in the broth, stirring distributes protein evenly and lets the meat soak up the seasoned liquid. At this stage you should taste the broth and adjust salt, because the upcoming cream and cheese will mellow the seasoning. A common error is under seasoning before adding dairy, which leads to a bland final soup, so correct flavors now.
Spoon soup into serving bowls and top with tortilla strips, avocado, sour cream, lime, fresh cilantro, or toppings of choice: As you ladle the hot, creamy broth into bowls you will notice steam and a tangy tomato scent complemented by cumin. Add crunchy tortilla strips last so they remain crisp, and top with cool slices of avocado to contrast warmth. A squeeze of lime brightens every spoonful. If you add crunchy toppings too early, they will soften and lose their appeal, so assemble directly before serving.
To Cook in the crockpot: When making this in a slow cooker the kitchen fills with a slow simmering aroma that deepens the flavors over time; this is ideal when you want to set and forget. Place everything except the heavy cream and cheese into the crockpot and cook on low for 6 hours, allowing the spices and tomatoes to infuse the chicken . Remove the meat, shred it, then return it along with the heavy cream and cheese and let it warm until the cheese melts fully. Watch the finish carefully; overheating dairy in a crockpot can cause separation, so stir and finish on low to keep the texture silky.