Peel the pumpkin, remove the seeds and boil until tender. Puree the pumpkin with a blender, adding olive oil, salt and pepper to taste. Dilute with pumpkin broth so that the puree is not very thick.
Steam the turkey. Grapefruit clear of skin and films. Cut zucchini into thin slices. Cut the tomatoes into slices.
Mix zucchini, grapefruit slices, tomatoes and lettuce mix. Put pumpkin sauce on a plate. Put the turkey fillet on the sauce. Arrange vegetables on top and drizzle with olive oil.