Using an oven proof casserole, heat

Using an oven proof casserole, heat a tablespoon of olive oil and a tablespoon of butter over medium heat. Let the butter foam but not burn and then add the onion and carrot and fry for about three minutes until they start to colour. Add the bacon lardons and continue to cook over a medium heat until the bacon begins to brown. Then add the garlic and cook for three or four minutes more. Don’t let the garlic colour, merely melt. Remove the vegetables and bacon from the pan, leaving the fats behind, and keep on one side.