Place the meat in the freezer for one hour, to aid in slicing.

Meanwhile, combine all other ingredients (besides cucumber slices).

Once meat has partially frozen, use a very sharp knife to dice it finely. Combine with mustard sauce and serve immediately.

Use an immersion blender to combine all ingredients besides oil.

Add in oil and blend for an additional minute until fully combined.

Place a spoonful of steak tartare in the middle of a cucumber slice. Roll up the cucumber.

Place seam-side down on a plate. Top with honey-mustard aioli.