Flatten the beef slices with a meat mallet until about 5 mm thick. Season with salt and pepper.
In a bowl, mix breadcrumbs, bacon, beaten egg, and parsley (or grated cheese, if using).
Place a spoonful of stuffing on each beef slice, roll tightly, and secure with a skewer or kitchen twine.
Heat olive oil in a pan and brown the rolls on all sides. Remove and set aside.
In the same pan, sauté onion and garlic until soft.
Add tomato paste and cook for 1–2 minutes, then deglaze with red wine.
Return the beef rolls to the pan. Add water or stock, cover, and simmer gently for about 1 to 1.5 hours, until tender.
Serve hot with potatoes, peas, or fresh bread.