Freezer Spaghetti Sauce

It has been far too long since I've posted something.  Yes, my family is still eating.  We got behind this summer with vacations and have barely been able to keep up with our vegetable farm share.  Most days we look at what veggies need to be eaten (and what can be frozen to use later) and we build a meal around that.  This is one exceptional recipe that we used recently.  Even my picky son, who won't eat "spaghetti & meatballs" with jarred tomato sauce, loved this.

Stephanie's Freezer Spaghetti Sauce
4 onions, chopped
4 cloves garlic, minced
1 green bell pepper, chopped
1/2 cup vegetable oil
16 cups chopped tomatoes
2 tablespoons dried oregano
2 tablespoons dried basil
1/4 cup chopped parsley
1/4 cup white sugar
2 tablespoons salt
3/4 teaspoon ground black pepper
1 (6 ounce) can tomato paste
In a slow cooker saute together the onion, garlic, green pepper, and vegetable oil. Cook until onion is transparent. Add the chopped tomatoes, oregano, basil, parsley, sugar, salt, and ground black pepper. Cook for 2 to 3 hours on low heat. Stir frequently. Let sauce cool. Pour sauce into quart size freezer containers. Store in freezer. When ready to use sauce, stir in can of tomato paste. [I only did 1/8 c sugar and 1.5 Tbsp sugar, and after having made this with pasta would double the tomato paste]
* Recipe from allrecipes.com by Stephanie Lane