Dry the meat with paper towels and season generously with salt and pepper. Set a heavy-bottomed pot over medium-high heat and add the oil. When the oil is hot, add 1/4 of the meat cubes. Brown the meat cubes deeply on two sides, then remove to a bowl and add the next small batch of meat cubes. Repeat until all meat cubes have been browned, adding more oil as necessary.
Reduce heat to medium and add the diced onion, adding more oil to the pot if needed. Sauté until softened, 4-5 minutes. Add the garlic, rosemary (stem too!), and bay leaves; sauté an additional minute. Stir in the red wine to deglaze the pot. Stir for 30 seconds, being sure to scrape any browned bits off the bottom of the pot. (SEE RECIPE NOTES FOR WORK-AHEAD OPTION) Add the cooking liquid. Stir until combined.
At this point, you can add the contents of the pot to a slow-cooker, along with the meat and any accumulated juices, a couple of pinches of salt, and a few grinds of black pepper. Set on low and leave alone for at least 6 hours and up to 8. OR, you can add the meat and juices back to the pot, season, bring to a boil, then place in a 325-degree oven until the meat is fork-tender, about 3 hours.
Skim any excess grease from the top of the stew with a spoon, or add as much of the broth as you can easily remove to a fat separator (see notes). Add the degreased broth back to the pot or slow-cooker.
Steam or par-boil the remaining vegetables until you can pierce them easily with a paring knife (there shouldn't be any resistance at all). Then I add the vegetables to the stew for the last 15-30 minutes of cook time and turn the slow-cooker to high.
Remove the bay leaves and rosemary stem. Ladle the stew into bowls and garnish with chopped parsley and a light sprinkling of Romano cheese. Serve. Enjoy!