1) In a pan boil salted water and cook beans till done.
2) Drain and keep aside warm.
3) In a pan melt butter and saute onion till soft.
4) Add curry powder and paste and lemon juice.
5) Cook for a while and add the beans.
6) Toss to coat the beans with the curry mixture.
7) Transfer beans to a warm serving dish and serve immediately with cold meats.