Frozen shrimp was good when I had a priority on quick dinners; usually some shrimp scampi variant. Have a turkey farm in town so a frozen turkey pie isn't a bad option. You do have the option of refrigerated ravioli or tortellini with some store-bought pasta sauce which comes closer to being a whole meal. After all, not every meal needs to be a complete/balanced one. I've also found other frozen stuff like soup dumplings that are really quick/easy to prep.