Here is a recipe from the July 2013 issue of the BBC Good Food magazine. Its from Barney Desmazery and he says: "This vegan curry is traditionally made with foot long snake beans cut into smaller pieces - but sliced runner beans make a great alternative. In Sri Lanka, this would be one of many different vegetable dishes served as part of a larger meal, but I find it perfectly substantial simply served with rice and rotis".
It states serve 4 but I'm not sure about that, depends on your appetite and how much you like runner beans! I haven't tried it yet but thought it would be a good recipe to have when our runners start to grow:
1 small onion, roughly chopped
1/4 tsp turmeric
large piece of ginger, peeled and roughly chopped
4 garlic cloves
2 tbsp vegetable oil
2 tsp black mustard seeds
5 fresh curry leaves
1 tbsp mild curry powder
400g can coconut milk
4 cloves
1 cinnamon stick
1 whole dried red chilli
300g/11oz runner beans, stringed and sliced
juice of one lime
1 tsp garam masala
handful of fresh coriander
1. In a blender, combine the onion, turmeric, ginger, garlic and 1tbsp of the oil with a large pinch of salt. Heat the remaining oil in a shallow pan. Add the mustard seeds and curry leaves, and cook until they crackle, then add the onion paste and cook until sticky.
2. Stir through the curry powder, then pour in the coconut milk. Add the cloves,cinnamon and the chilli, and bring to a simmer. Tip in the beans and simmer for 15 mins or until the beans are tender. Squeeze in the lime juice, add the garam masala, take the pan off the heat and stir through the coriander. Serve with rice and rotis, if you like.
As I say, I haven't tried it yet, but will report back when I have. Also, I reckon you could get away with dried curry leaves and dried chilli flakes instead of a whole dried chilli if thats what you've got in the spice drawer!
http://www.bbcgoodfood.com/recipe/sri-lankan-runner-bean-curryEdit to add link attributing online source.