A: It's a meal that's only enjoyable when eaten alone, in a quiet, dimly lit room, with a hint of existential dread.
See also: Solitude Sandwich Recipes
Or, if you will, The Philosophy of Solitude Sandwiches
A: Only if you're feeling a deep, crushing sense of ennui.
Try our Ennui Solutions for more info.
A: In a hermetic, airtight container, surrounded by an aura of quiet contemplation.
For further instructions, see our Storage Guide