Italian Braised Beef Shanks (Osso Buco Style)

Preheat the oven to 325F.
Pat the beef shanks completely dry with paper towels and season both sides with 1 1/2 tsp salt and 1/2 tsp black pepper, then dredge lightly in the flour, shaking off the excess.
Heat 3 tbsp olive oil in a large Dutch oven over medium-high heat until shimmering, then sear the shanks in batches for 3 to 4 minutes per side until deeply browned; do not crowd the pot, and set the shanks aside on a plate once browned.
In the same pot, add the onion, carrots, and celery, and cook 6 to 8 minutes, stirring and scraping up the browned bits from the bottom, until softened.
Add the garlic and cook 1 minute until fragrant, then pour in the red wine, scraping the pot again, and simmer 3 to 4 minutes until reduced by about a third.
Stir in the crushed tomatoes, beef broth, bay leaves, and thyme, and bring to a simmer.
Nestle the seared shanks back into the pot so they are mostly submerged in the liquid, cover with a tight-fitting lid, and transfer to the oven.
Braise for 2 1/2 to 3 hours, checking once at the halfway point to make sure there is still enough liquid (add a splash of broth if it looks dry), until the meat is fork-tender and pulls away easily from the bone.
Carefully remove the shanks from the pot and set aside; discard the bay leaves.
If the sauce looks thin, simmer it uncovered on the stovetop over medium heat for 5 to 10 minutes until it thickens to a rich, spoon-coating consistency; taste and adjust salt.
While the sauce reduces, mix the parsley, lemon zest, and remaining minced garlic clove in a small bowl to make the gremolata.
Return the shanks to the thickened sauce to warm through, then serve each shank topped generously with the sauce and a spoonful of fresh gremolata.

Sear the shanks in batches without crowding the pot; too many pieces at once lowers the pan temperature and steams the meat instead of browning it.

Check that the meat is truly fork-tender (it should pull apart with light pressure) before ending the braise; undercooked shanks stay tough no matter how good the sauce tastes.