Have you thought about making your own from fresh? I like to toss beef or chicken strips with broccoli, mushrooms, snow peas, and whatever else I fancy in wok oil and soy sauce. Comes out pretty good and you can't beat fresh veggies.

For convenience though, of course, try to avoid mixes with carrots. If they're there, pick them all out before you cook. I'd avoid anything with any type of sauce as well, because they're loaded with sugar and cornstarch.

Veggies don't have to be salad. I hope you find a good stirfry and enjoy it.