heat oil in large pan then add bacon and cook over med heat. Using a slotted spoon transfer bacon in the crockpot and switch cooker to high. working in batches ass the beef to the pan and cook for 6-8 minutes turning to color all sides. transfer beef to the crockpot. pour the wine and stock over the beef and add the onion. stir in carrots and cook for another 5 minutes. stir in tomatoes, tomato puree and garlic and then transfer to crockpot. cover with the lid and switch cooker to low. Cook for 5-7 hours.