Fresh veggies are preferred most of the time; however, I always have frozen chopped spinach (for lasagna or under fish that will be cooked in the oven), frozen peas and frozen corn. I also like the frozen mix of corn, peppers, onions and black beans. Put some of this on a tortilla with some cheese and salsa, zap it for 30 seconds and you have a great quesadilla.
Frozen edamame are also convenient.