I used to make oven baked liver treats. When baking they stink like nothing else, but most dogs go a little mad for them. Please note, that I mean they super-stink up the entire house.
The recipe was from a trainer friend and my memory is vague, but it was basically...A tub of liver put through the blender or food processor, a tea to table spoon of garlic salt, and equal parts flour and cornmeal, a bit of water if necessary. Blend until it is mushy, then bake it on cookie sheets. Slice it up with a pizza cutter once it's cooled.