Clear liquid diets allow foods that you can see through like gelatin, broth, soda, and popsicles. Solid food and opaque liquids like meat, fruit, and milk are off-limits on a clear liquid diet.

Recipes using aspic (specifically boiled fish bone gelatin) date as far back as the 10th century, when it was noted that fish and meat cooking liquid set to a gel. To use it as a setting agent ...