Warm two pasta bowls in the oven.
Drain and rinse the beans thoroughly. Set aside. Chop the chives or onion.
In a small saucepan, melt the butter in the olive oil. Stir in the chives. [If using onion, cook the onion until translucent and soft.]
Remove from heat and stir in the remaining ingredients. Tip all into a 1-quart measuring cup. Cover and heat in an 1100-watt microwave oven at 70% power for 3 minutes 25 seconds.
Serve in bowls, with crusty bread.