Really helpful today

My mom is a godsend...and a really good cook.  She made me some chicken stock and it is really tasty.  This is the recipe she uses:

Ingredients

• 3 (5-pound) roasting chickens (actually, she uses 3 carcasses from the chickens you buy at Costco)
• 3 large yellow onions, unpeeled and quartered
• 6 carrots, unpeeled and halved
• 4 stalks celery with leaves, cut into thirds
• 4 parsnips, unpeeled and cut in half, optional
• 20 sprigs fresh parsley
• 15 sprigs fresh thyme
• 20 sprigs fresh dill
• 1 head garlic, unpeeled and cut in 1/2 crosswise
• 2 tablespoons kosher salt
• 2 teaspoons whole black peppercorns

Directions

Place the chickens, onions, carrots, celery, parsnips, parsley, thyme, dill, garlic, and seasonings in a 16 to 20-quart stockpot. Add 7 quarts of water and bring to a boil. Simmer, uncovered, for 4 hours. Strain the entire contents of the pot through a colander and discard the solids. Chill the stock overnight. The next day, remove the surface fat. Use immediately or pack in containers and freeze for up to 3 months.

She also froze them for me using silicone ice cube trays (which measure exactly one ounce each), like these:

and individually froze them, using a Seal-a-Meal vacuum sealer.  She did this so they wouldn't stick and they would be exactly one ounce each.    I just defrost them in the microwave and enjoy!

So very helpful!  and Yummy :)