Oxtail Ragù with Semolina Gnocchi

Toss oxtails, flour, pepper, 2 Tbsp. or 1 Tbsp. salt in a large bowl until oxtails are evenly coated. Heat oil in a large heavy pot over medium-high. Working in batches, cook oxtails in a single layer, turning occasionally, until browned all over, 15–20 minutes. Transfer oxtails to a plate as they’re done.

Cook onion, carrots, celery, garlic, and rosemary in same pot, stirring often, until vegetables are browned around edges, 10–15 minutes. Add wine, tomatoes, vinegar, and honey, stirring and scraping up browned bits; bring to a boil. Season with several generous pinches of salt and return oxtails to pot. Pour in water just to cover oxtails; bring to a gentle simmer. Partially cover and cook, reducing heat as needed to keep at a bare simmer, until meat is falling off the bone, 3–3 1/2 hours. Let cool; cover and chill at least 12 hours.

Line a 13x9" baking dish with parchment paper, leaving overhang on 2 sides. Bring milk, butter, and several pinches of salt to a simmer in a large saucepan over medium. Gradually whisk in semolina and cook, whisking, until very thick and bubbling, about 3 minutes. Remove from heat; add 1 cup Parmesan and whisk until smooth. Whisk in egg yolk and scrape gnocchi mixture into prepared pan; smooth top. Cover and chill until set, at least 2 hours and up to 12 hours.