I made a vegetarian haggis this year. It had minced carrots, mushrooms and onions in it, as well as ground oatmeal, red lentils, mashed kidney beans, hazelnuts and peanuts. The whole thing was seasoned with soy sauce, lemon juice, thyme, rosemary and something called "mixed spice," which had cloves and nutmeg and cinnamon and ginger in it. Then I molded it into a loaf and baked it. Edible, certainly, but it went down better with a little HP Sauce on top.
It's a much better story to say it's made of vegetarians.