Easy one-pot chicken casserole - Good Food Middle East

Ingredients

• 8 bone-in chicken thighs, skin pulled off and discarded
• 1 tbsp oil
• 5 spring onions, sliced
• 2 tbsp plain flour
• 2 chicken stock cubes
• 2 large carrots, cut into batons (no need to peel)
• 400g new potatoes, halved if large
• 200g frozen peas
• 1 tbsp grainy mustard
• small handful fresh soft herbs, like parsley, chives, dill or tarragon, chopped