In a large pot, heat oil over medium heat
Add the chopped onions and sautée until soft and translucent, 3-4 minutes
Add the chopped bell pepper, black beans, kidney beans, sweetcorn, chicken broth, and spices. Bring soup to boil.
Reduce heat to medium-low. Leave to simmer for 5 minutes.
Add shredded chicken and simmer for a further 5 minutes, stirring occasionally
Serve hot. Add your choice of shredded cheese, cilantro, sour cream, or tortilla strips.