Slice cucumber diagonally as thinly as possible and place in a
large, shallow bowl. (Try using a vegetable peeler, cheese slicer or
mandoline to get thin slices.) Warm the vinegar in a small saucepan and
add the sugar and salt, mixing until dissolved. Add the mint and
Tabasco and remove from heat. Immediately pour over the cucumber and
mix well. Allow to cool to room temperature, then cover and refrigerate
for 1 hour or overnight.
Just before serving, cut the baguette and drizzle with olive oil.
Slice the lamb thinly and arrange on one side of the baguette. Top with
the cucumber, season with salt and pepper to taste and top with other
half of baguette. Repeat for other baguette.
TIP: The mint-pickled cucumber can be made a day
ahead and refrigerated in a sealed, non-reactive container (e.g.
glass). The roast lamb will keep 2-3 days, covered, in the refrigerator.