Here is a marinara sauce to use in Cooking Day for recipes calling for spaghetti sauce or marinara. Combine and let simmer while preparing other OAMC cooking meals, then use for your pasta recipes. I've never measured how many cups it exactly makes but from how much I use, I good range would be about 10-12 cups after simmering. I'm allergic to green peppers so I omit them from any recipe, but feel free to add them or other vegies such as mushrooms to tailor the sauce to the way you like it!
For portions, I considered it 10 cups and considered one portion as 1/2 cup (20 portions), but again, I use it for OAMC so it works into other recipes.