Halve the avocado,
remove the seed and scoop out avocado flesh and put in a bowl. Add lemon juice and mix.
Put the tomatoes in a
blender jar and blend to a smooth puree.
Take ½ avocado flesh
in another bowl and mash. Add tomato puree and mix. Add remaining avocado flesh and mix well. Add salt and crushed peppercorns and mix well.
Fill a piping bag fitted
with a star nozzle with the avocado-tomato mixture and refrigerate to set and thicken. This is tomacado mousse.
Discard the ends of
the cucumber and make ribbons with a peeler.
Shape each cucumber
ribbon to a round ring and place them on a serving platter. Pipe the tomacado mousse in the center of cucumber ribbon rounds.
Top each with a
tomato triangle and serve immediately.