From a humorous website post on whether to keep ketchup in the fridge: How to Cook a Carp.

Make a marinade using two fifths of vodka and one of vermouth. Place a bottle of ketchup near pan. Sear carp in pan, turning until well done. Using a set of tongs wave the carp over the marinade and discard both the carp and ketchup. Drink the marinade.