Preheat the oven to 275 degrees F.
Heat the olive oil in a heavy ovenproof pot (with a lid) over high heat. Salt and pepper both sides of the roast, then sear it for about a minute on one side and a minute on the other side. Remove the meat to a plate.
Reduce the heat to medium high and add the tomato paste, celery, garlic and onions. Stir it around and cook until the vegetables start to soften and the tomato paste releases its flavor, 2 to 3 minutes. Pour in the glorious wine, then stir and scrape the pot to get up all the browned bits on the bottom. Pour in the broth, then stir in the marmalade.
Return the meat to the pot and top it all off with the potatoes, carrots, parsnips, rosemary and thyme. Push the veggies and herbs into the liquid, then put the lid on the pot, transfer to the oven and roast until the meat is fork-tender, 3 to 4 hours. (Mmmm. The liquid becomes something magical.)
Transfer the roast to a serving dish (if it falls apart that's a good sign!) and place the vegetables all around it, then spoon on as much sauce from the pot as you'd like. Total, unmistakable, comfort food.