My girlfriend is trying to diet, and I know that veggies are good for dieting. So my question is, is there such thing as to much veggies? Also which veggies are rally good when trying to lose weight? Also we eat sweet potatoes a lot, is it bad to have sweet potatoes and veggies with dinner? And all we know how to do is just bake the sweet potato. Are there better or different ways to cook them? Are frozen veggies healthier then canned veggies? We buy some fresh veggies, but we only shop once a month, so it's hard to buy a bunch and eat them before thy go bad.