Place the chicken breasts in the bottom of the slow cooker. Add both cans of beans, then layer in the onion, red bell pepper, garlic, and jalapeño.
2 pounds chicken breast
1 can (14 oz / 400 g) red kidney beans
1 can (14 oz / 400 g) cannellini beans
1 medium onion
1 red bell pepper
4 garlic cloves
1 tablespoon jalapeño