Slice one onion and line the bottom of the crock pot (this raises the meatloaf off the bottom and prevents burning).
Add the ground meat and bread crumbs to a large mixing bowl.
Chop the vegetables (onion, bell pepper, celery and garlic) and add to the mixing bowl with the meat and breadcrumbs.
Add the remaining ingredients and combine well. Keep kneeding the mixture until it is well mixed and place mixture onto a chopping board to create your ‘loaf’ shape.
Keep patting the loaf and moulding it until no cracks are on the surface of the loaf.
Carefully place the loaf on top of the onions in the crock pot and cook on low for 6 hours or high for 4 hours.
Coat the meatloaf with preferred sauce and cook a further 40-60 minutes.