Preparation Brown hamburger and onions and drain. Put in slow cooker along with the rest of the ingredients and cook on low 8 to 10 hours.Sandy's Note: My mom always cooked this on top of the stove for 4 or 5 hours, but I like the slow cooker method. More RecipesSlow Cooker Bolognese SauceSpaghetti and MeatballsMeaty Spaghetti SauceNess's Crockpot Lasagna