I am looking for a spaghetti sauce recipe that I can use my home grown grape tomatoes for, and it also can't have onion in any form

My 4 grape tomato plants are starting to overwhelm me with product so I need a way to use it all. I'd like to make a sauce tomorrow since we are having spaghetti.

1. How many grape tomatoes do you think I'd need to make enough sauce for say 5 bowls? We don't go heavy with it. I'd be willing to supplement my supply with canned.

2. My mom absolutely hates onion in all it's forms, she might as well be allergic to it.

3. Which is why I'm asking here for a recipe. I would just google it but I'm at work ATM so :/

bon appetit