What is a healthy choice besides... healthy choice meals, they're in the freezer section at the store and they're super cheap some of them.
I like the chicken alfredo and the ginger chicken, also all the steamers.
I've heard good things about Amy's as well.
As for legit food, here's a few quick healthy snack recipes:
(well, pretty healthy. Not all of them are diet food exactly, but a single pudding cup isn't gonna kill you, plus it's got pretty basic ingredients.)
-Cut up a large apple finely, sprinkle on cinnamon, microwave for 1-2 minutes. Just like apple pie filling!
-Cut up a cucumber and put some Splenda or Truvia over the slices
-Make sf/ff jello and add in fruit of your choice, read label to see what will let it set though!
As for not really recipes, have fruits and veggies, choose whole grains, eat lean cuts of meat and skim milk. Also, for some great healthy recipes try undressed skeleton!