Saute onion in Instand Pot, dutch oven or slow cooker until translucent.Season with salt and pepper to taste. Stir in garlic until fragrant.
Place ingredients into the pot (onion, garlic, chicken breast ,beans, corn, salsa, canned tomatoes, stock, green chillies, seasonings). Instant pot: high pressure 30 minutes.Slow cooker: cook on high for 4 hours or slow for 6-8 hours.Dutch Oven: bring to slow simmer and cook for 45 minutes-1 hour. Once cooked, remove chicken breast and shred the meat. Put back into soup and stir.
Squeeze the juice of one lime, add chopped green onion and cilantro. Season with salt and pepper to taste.
Serve with : green onions, cilantro, avocado, tortilla chips. Enjoy!