MonoSauce (aka Mono Sauce) is a famous sauce served in every Monolith Burger. There is also a second variety known as Mono sauce No. 2. There is also an unindentified Monolith Burger Secret Sauce.

Mono sauce was part of Monolith Burger's ingenious (or maybe not so ingenious) marketing plan for marketing their own version of Ketchup.

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