Preheat a large Dutch oven over medium-high heat and oven to 300 degrees F with racks in lower third and upper third of oven.
Pat meat dry and season with salt and pepper. Add some olive oil to the pan, 1 turn of the pan, melt about a tablespoon of butter into oil and when it foams, add about a third of the meat. Brown evenly on all sides and remove, then repeat with more oil and butter as needed and removing meat to platter or tray as you work. Add remaining oil and butter and when butter foams add the onions, fennel and garlic, bay, citrus and rosemary. Partially cover and soften about 10 minutes. Add tomato paste, then stir and add wine. Reduce 2 to 3 minutes, then add beef, stock, semi-dried or sundried tomatoes, olives and chile flakes or paste. Cover and place in oven for about 2 hours until very tender.
Arrange the Roma tomatoes on a small baking sheet, dress with EVOO, thyme, salt and pepper and slow roast them along with the meat, for 2 hours.
Serve beef on a platter topped with tomatoes or in shallow bowls atop Polenta or potatoes.
Heat water and milk in a saucepan to a low boil, then whisk in cornmeal and season with salt and pepper. Cook 35 to 40 minutes, whisking occasionally, until thickened and creamy to taste. Stir in butter to serve.