Cut the beef either into cubes or large strips, as you prefer. Lightly flour the cubes or strips and brown them in the butter in a large braising pan until golden brown on all sides. The flame should be lively, but be careful to adjust the temperature so the butter doesn't burn. (A drizzle of vegetable oil helps to this end, even if it's not traditional.) Make sure the pieces are well-spaced so they brown nicely; proceed in batches if you need to. Remove the pieces from the pan as they're done.
Add the onion to the pan and sauté gently until the onion is soft and translucent, seasoning with salt and pepper as you go. Add back the beef and turn everything together, seasoning again. Let the beef and onions simmer together for a few minutes, then add enough red wine to barely cover the beef. Nestle the herbs and spices in the pot among the beef pieces.
Cover and let the pot simmer very gently until the beef is perfectly tender, about 1-1/2 to 2 hours, depending on the quality of beef and the size of your pieces. Be sure to stir from time to time, as the sauce tends to stick to the bottom of the pot. Add more wine or water if need be to keep things moist and loose, but let the sauce reduce towards the end.
Serve piping hot over freshly made polenta.