Pour in the chicken stock, then add the pinto beans, kidney beans, frozen corn, and crushed tomatoes. Stir to combine, making sure nothing is stuck to the bottom of the pot.
2 cups chicken stock
1 can (14 oz / 400 g) pinto beans
1 can (14 oz / 400 g) red kidney beans
½ cup frozen sweet corn
2 cans (14 oz / 400 g) crushed tomatoes