Pasta dishes are just always delicious!
Chop the onion, greens and garlic. Sauté these vegetables in the oil in a saucepan – just before they start to roast, add the tomatoes. Cook heartily for 10 minutes.
Cut leftover roast into small pieces and add. If there is any leftover gravy, add it as well. If a few kitchen herbs (parsley, chervil or possibly basil) are available, they would of course do no harm! Then add the celery cut into slices.
Make pasta in salted water and mix with the sauce.
Bring to the table sprinkled with freshly grated Allgäuer Emmentaler.