7: Add the chopped hard-boiled eggs, salt lightly and pepper to taste, then add 1 tablespoon Mustard and mix in.
8: Check the vegetables: they should be tender, but still nice and green. Drain thoroughly.
9: Serve the vegetables plated up, topped with the "à la flamande" sauce.
Remarks
If you don't like mustard, you can use lemon juice or vinegar instead. Of course, if you possess a steam oven, use this to cook the vegetables as you would normally.