In a large bowl, mix together the ground beef and water (if using) until well blended. Season with garlic powder, curing mixture, liquid smoke, mustard seed, and and sugar, and mix thoroughly. It is best to use your hands for this - like meatloaf. Form the mixture into 2 rolls, and wrap with plastic wrap or aluminum foil. Refrigerate for 24 hours.

Preheat the oven to 275 degrees F (135 degrees C). Line a baking sheet with parchment. Remove wrapping from the beef; place on the prepared baking sheet.

Bake in the preheated oven for 2 hours. Cool, then wrap in plastic or foil, and refrigerate until cold before slicing.