Wash the lettuce, radishes and cucumber.
Cut the radishes and cucumber into round slices.
Open the croissants lengthwise.
Spread a tablespoon of houmous over the base of each croissant, and on the other side of the croissant, spread a teaspoon of mustard.
Fill each croissant with two lettuce leaves.
Then add a few slices of radish and cucumber.
Finish with 4 slices of Isigny Sainte-Mère Extra Mature Mimolette and close up the croissants.