Combine the orange juice, Cointreau, marmalade, wine, and marjoram in a small saucepan and cook, stirring, until well blended and thick enough to coat a spoon. Lower the heat to just barely on.
In a skillet over medium heat, fry the bacon until crisp. Allow to cool, then break into small pieces (but not quite crumbled). Pour off the excess bacon fat, but don't wipe the pan.
Combine the flour, salt, and Creole seasoning with a fork in a wide bowl.
Slice the liver in wide slices about 1/4 inch thick. Pass through the seasoned flour.
Melt the butter in the same skillet you fried the bacon in, over medium-high heat. When it begins bubbling, sauté the liver for about two minutes on each side, leaving some pink in the center.
Remove the liver to a metal baking pan. Spoon sauce over each slice. Arrange the orange slices between the liver. Run under the broiler for about a minute, until the sauce starts bubbling.
With a spatula, transfer the liver and the orange slices to serving plates. Add a little sauce around the side.
