Step 2
Cut the kidneys in half, and remove the tubes and skins; rinse well under cold running water. Pat dry, and cut into 1/2 inch dice. Pour the vegetable oil into a large, heavy bottom pot, and set over medium-high heat. Season the flour to taste with salt and pepper in a bowl. Toss the kidney and stew meat in the flour; shake off the excess. Sear the meat in the hot oil until well browned, then remove. Add the bacon to the pot and cook until crisp. Stir in the onion and mushroom, and cook to soften, about 2 minutes. Pour in beef stock, wine, and browned meat; bring to a boil, stirring constantly, until the mixture starts to thicken, about 5 to 10 minutes. Reduce heat to low, and simmer 1 1/2 to 2 hours, until meat is tender. Remove from heat, and cool to room temperature.