Fajita chicken one pot

Name: Fajita chicken one-pot
Ingredients: 2 tsp olive oil; 200g cooking chorizo, roughly chopped; 6 boneless and skinless chicken thighs, roughly chopped; 2 red onions, roughly chopped; 2 Romano peppers, roughly chopped; 1½ tbsp fajita seasoning; 400g can pinto beans, drained and rinsed; 350g new potatoes, halved, or quartered if large; 300ml chicken stock, made with 1 stock cube; 3 corn on the cobs, halved or quartered; 100g soured cream, to serve; handful of parsley, chopped, to serve (optional)