Dice the onion, seed and finely chop the jalapeño and mince the garlic.
Heat the oil in a large pot over medium heat. Cook the onion, jalapeño and garlic with the cumin and oregano for about 6 minutes until soft.
Add the broth, beans and whole chicken breasts. Bring to a boil over high heat, then simmer over low heat for 20 minutes, until the chicken reaches 74°C (165°F). Lift out and shred.
Mash about a cup of the beans against the side of the pot to thicken the chili.
Return the chicken and add the corn. Simmer over medium-low heat for 3 minutes.
Take off the heat and stir in the Greek yogurt, lime juice and cilantro. Do not boil after adding the yogurt or it may split.