Cut the filo pastry sheets into squares and then oil each square on both sides.
For each flower shape, place three thin pastry sheets into a small ovenproof dish and place in the oven at 180°C for about 10 minutes. The flowers should be golden brown.
Peel the carrots and make carrot tagliatelle with a peeler. Make Supremes with a grapefruit (quarters with the white skin removed).
Peel the prawns.
Cut the Reblochon into cubes.
Make a vinaigrette with the juice of half a grapefruit, the single cream, a few drops of lime and the chives. At the bottom of the flowers, place a few mixed lettuce leaves, the carrot tagliatelle, grapefruit Supremes, prawns, the Reblochon cubes and cover with some of the sauce.