Treating myself while husband is traveling

My husband has been traveling a lot lately and one thing that my mom suggested I do to make it easier on myself is to consider the time while he's away "spa time" for myself. She meant giving myself pedicures and taking baths, reading trashy novels, and generally being nice to myself, which I'm down with. One thing I want to do, though, is make myself some "spa dinners" that feel fancy and luxurious but aren't calorie bombs. My husband is allergic to shellfish, so now is a good time to eat shrimp, etc.

Any recipe ideas? I want to keep it easy - I'm not in the mood to cook super complicated meals when it's just me (often it's just Lean Cuisines when he is away!)