Introducing the all new taste of Slig - The Sweetest Meat this Side of Heaven!(tm) Straight from the master Tleilaxu chefs to your growling stomach, you've never tasted anything quite like Slig. In fact, we dare you vegetarians to taste just one tiny strip of Slig meat from its external ribs and see if you ever touch vegetables again! It's the only meat that comes with its own sweet sauce, a fine jelly secreted from its mobility sphincters that softens its delicious underbelly! Don't settle for just any genetically engineered food organism, think big! Think Slig!
I bet he was a Zenshiite slave that the Tlulaxa captured, intending to sell, but he won them over with his ideas and turned them to Zensufism, transforming the Tlulaxa into the Bene Tleilax.
I recall on your old art of dune site you had a much more cartoony version. The caption within the picture just cracks me up because it almost works for a magazine advertisement except in layout.