Cooking for the masses

I have a friend who makes spaghetti sauce twice a year. He cooks HUGE portions and then freezes them in those reusable Glad/Ziploc containers with the blue lids. We eat spaghetti once a week and I need to make a habit of cooking bigger portions so I am not repeating what could of have been done once instead of four times a month. Even if I could enough for one month that would be a huge win on time for me.