Use whatever beans or lentils you have at hand.
2 cups of mixed beans, lentils, chickpeas whatever
1/2 cucumber, cut in small pieces, seeds removed
4 small radish, cut in small pieces
5 tblsp white wine vinegar
4 tblsp mustard (hot!)
2 tblsp olive oil
2 tblsp minced dill
salt & pepper
Mix all ingedrients and off to the office you go!