Cut the tripe into strips, put it to boil in lightly salted water, a bay leaf and cook for about 5 minutes, drain the tripe and rinse it.
Cut the carrots into rings, the onion into slices, the celery and in a little oil, let it fry for about 10 minutes, then add the chopped walnuts and almonds. Leave to flavor for about 10 minutes, add the drained tripe and put it back on the fire for another 10 minutes, stirring occasionally, add the tomato, cover with broth, taste salt and pepper and finally add the thyme and cinnamon.
Bring to a boil and leave to cook for about 45 minutes. When cooked, add the grated rind of the lemon.
Serve still hot, sprinkling with parmesan or flaked cheese.