Hello, I just cook up a big ratatouille and freeze it in dinner sized containers. Your pick of meditteranean veggies plus plenty of onion to sweeten it up and off you go!

My Italian friend explained that if you want really good sauce you need to both peel and also de-seed the toms, the seeds can make your sauce a bit bitter. Involves preboiling the tomatoes whole, then squishing them through a sieve, a long messy process but you get a much better puree at the end. Sorry I don't have an actual recipe tho.