Heat the oil in a pot over medium heat and fry the diced gammon for about 2 mins until done. Remove the gammon pieces and set aside.
Add laksa paste to the pot and stir-fry for 1 min until fragrant. Add the coconut milk, chicken stock and soy sauce bring to the boil, reduce heat to medium-low and simmer for 15 mins.
Add the beans and simmer for 5 mins, then add the mangetout, gammon and tomatoes and simmer for a further 2 mins.
Ladle the gammon laksa into bowls and top with spring onions, limes, chilli and coriander.
Tips - add some rice noodles for a more substantial meal.