Creamy chicken & sweetcorn soup - Master recipes

Ingredients

• 1 tbsp olive oil -
• 1 celery stick -
• 1 leek , finely sliced -
• 300ml strong chicken stock -
• 250g sweetcorn (use fresh or frozen), half of it crushed lightly with a fork -
• 200g greens (such as spinach or kale), finely sliced -
• small bunch chives , finely snipped -
• 25g butter -
• 25g plain flour -
• 250ml milk -
• 1 tsp olive oil -
• 2-3 (depending on size) skinless chicken thigh fillets, cut into cubes -
• 1 skinless chicken breast, cut into cubes -
• ⅓ onion , very finely chopped (optional) -