Add a splash of olive oil to the large frying pan along with half the pouch of curry paste and about 1/2 tsp of the herb mixture. Heat until fragrant, then add the chicken and cook until browned, stirring regularly.
Add the first sachet of coconut milk. Add the remainder as you go along, up to about half the second sachet, keeping it from getting too dry.
Cut the sweetcorn into small pieces and destring the peas, add to the pan. Simmer for 5-10 minutes.