Our frozen broccoli was blanched for a minute or two in our kitchen before cooling and freezing. It is not a substitute for fresh broccoli in salads or places where you really need the veggies to be crisp. But they are fantastic for pastas, burritos, casseroles, quiches, soup etc. To reheat, bring some water to a boil in a pot and put in all or a part of the bag of broccoli (you can saw off chunks of frozen if you don't want to use the whole thing). Heat for 2-5 minutes, testing each minute after 2 minutes to see if it has reached the tenderness you seek.