I used to make this in my tiny crock pot in my college dorm and after a few hours people would start sniffing around. This will make your whole house smell AMAZING!
Put roast in crock pot
Dump package of lipton beefy onion soup mix on top
Dump can UNDILUTED condensed roasted garlic cream of mushroom soup on top (regular or sodium-reduced cream of mushroom works too)
Cook on low for AT LEAST 8 hours, tearing up the meat as it gets tender helps the process.
Eat over; mashed potatoes/stuffing/bread bowl/naked woman etc.