In a large saucepan over high heat combine the water, cider vinegar, red wine vinegar, onion, carrot, salt, pepper, bay leaves, cloves, juniper, and mustard seeds. Cover and bring this to a boil, then lower the heat and simmer for 10 minutes. Set aside to cool.
Pat the eye of round dry and rub with vegetable oil and salt on all sides. Heat a large sauté pan over high heat; add the meat and brown on all sides, approximately 2 to 3 minutes per side.
After 3 days of marinating, preheat the oven to 325° F.
Add the sugar to the meat and marinade, cover and place on the middle rack of the oven and cook until tender, approximately 4 hours. Alternatively, place in a slow cooker and cook on high for 6 to 8 hours.
Remove the meat from the vessel and keep warm. Strain the liquid to remove the solids. Return the liquid to the pan and place over medium-high heat. Whisk in the gingersnaps and cook until thickened, stirring occasionally. Strain the sauce through a fine mesh sieve to remove any lumps. Slice the meat and serve with the sauce, braised red cabbage and buttered noodles. Yield: 6 servings.