Easy options that aren't very expensive (US only):
* Annie Chung soup bowls (I've just discovered this line, so I'm not fully familiar with what's vegan or not).
* Just about anything from Tastybite,
* Just about anything from Fantastic Foods/Fantastic World Foods (especially those soup in a cup thingies - yum)
* Some Thai Kitchen flavours (watch out, though - some of their flavours have crap like chicken stock in them)
* Hormel vegetarian chili
* Bush's vegetarian baked beans
* Manwhich sloppyjo sauce (super scrummy if you sub TVP instead of ground meat).
* Some Simply Asian flavours (so far, the tofu miso and the hot sweet & sour seem ok but that was only at a glance cause I was in a hurry)
*Heinz vegetarian beans in the green & pink can (cut up some good vegan notdogs in it and you have weniebeanies
* Hunt's spaghetti sauce except
for the flavours that obviously aren't ok like the meated ones and the cheese flavours IF you're avoiding cheese.
And everyone else has given some great options for veg*n fast food dining.
But MY favourite short-cut isn't really cooking whole meals for the freezer, it's cooking seperate things that can be combined later. For example, I'll make up a biiiiig pot of rice so I can eat on it one night and put the rest into individual portions in zipper topped baggies for nuking later. Just about any whole grain freezes nicely, too so don't feel you're limited to JUST brown rice.
A lot of beans freeze really well, too. Some of them do get a bit mushy in the re-thawing so either slightly undercook your beans or make "refrieds" out of them when they thaw.
Frozen fruits and veggies are your friend! A couple of bags of single veggies and a couple of bags of blends will help keep the variety going, but do feel free to keep more on hand if you want.
And don't forget frozen greens like spinach and mustard greens for variety and extra nutrition. They're also lovely during times when the fresh version is a tad pricey or hard to find, too.
Tinned tomatoes (diced, stewed, whatever), tinned beans and even tinned olives or tinned green chilis/jalapenos will help round out your quickie foods pantry. If you can get raw nuts, they're also really handy for extra nutrition/extra flavour but they don't keep well in things so only use them as a garnish when serving.