Start by placing the beef chuck into a slow cooker or pot.
Add the whole onion, the halved carrots, and the garlic cloves.
Pour in the water, then sprinkle in the brown gravy packet, Hidden Valley Ranch packet, and Italian dressing packet.
Cover the pot and cook on high for 4.5 hours, or on low for 8.5 hours, until the meat becomes tender.
Once done, serve the pot roast over a bed of mashed potatoes.
