M.P.
I suggest that you heat them up quickly in the microwave or on top of the stove. Letting them sit for an hour or two will make them soggy and reduce the sharpness of the flavors. Since they're already cooked, it won't take long for them to reheat.
This is a yummy recipe. My Mother and Aunts often cooked green beans in a similar manner.
my expertise is the result of a home economics background.