Chicken Tortilla Soup

My sister passed this recipe along years ago. Not sure of where it came from, but it is delicious!

2 tbl oil
1 medium onion
2 cups cooked chicken (shredded or diced)
1 (15.25 oz) can corn (drained)
1 (15 oz) black beans (rinsed and drained)
1 (15 oz) diced tomatoes (NOT drained)
1 (4 oz) green chilies (drained)
1 (1.25 oz) taco seasoning packet
2 (14.5 oz) chicken broth
1 tbl lime juice

Saute onion in oil until onion is clear/tender

add all except broth and lime juice, mixing to blend seasoning & heating through

add broth and bring to a boil

simmer for 10 to 15 minutes

add lime juice

top with tortilla strips or crushed tortilla chips (we did those with "a hint of lime"), shredded cheddar cheese, cilantro & sour cream