Step 1

Switch on slow cooker and add olive oil, onions and garlic. Place lid on slow cooker.

Step 2

When the slow cooker has heated up and the onions are translucent, add the ground beef and break into small pieces using a wooden spoon. Replace the lid, and allow the meat to cook for ten minutes while you prepare the rest of the ingredients.

Step 3

Add the other ingredients to the slow cooker, and stir, again breaking up any large lumps of mince.

Step 4

Cook on high for 4 hours, or low for 8 hours.

Step 5

Serve over spaghetti and sprinkle with freshly grated Parmesan cheese.