For home freezing, the best way to heat almost all vegetables is in boiling water. Dump the vegetables in the boiling water, cover and start counting immediately. Keep boiling over high heat for the time given.
Immediately plunge vegetables into a large quantity of very cold water or iced water. It will take about twice as long to cool the food as it does to heat it. Remove from the water, drain and cool to room temperature. Freeze on a cookie sheet to keep vegetables from sticking together.
Pack the cold frozen vegetables in air tight plastic bags or other sturdy containers. Leave 1/2-inch head space and seal. Freeze at immediately.
Timetable for Blanching Vegetables
Asparagus 3 minutes
Beans, green 3 minutes
Beets, medium 45 to 50 minutes
Broccoli florets 3 minutes
Carrots 5 minutes
Peas 3 minutes
Peppers in slices 3 minutes
Zucchini can be shredded and put in bags for cakes and muffins during the off-season. Simply put away the quantity the recipe calls for in a heavy-duty plastic bag. Pull it out and thaw completely when ready to prepare your cake or muffins. You can use the juice that comes off from the freezing process in the recipe instead of some of the liquid called for, or you can just throw it away.