One time I was cooking pasta, to mix with some left over, home made meat sauce in the fridge. After I started the pasta, I realised there was no enough sauce.

One time I was cooking pasta, to mix with some left over, home made meat sauce in the fridge. After I started the pasta, I realised there was no enough sauce. So I added fresh crushed tomatoes, which had only enough time to warm up, and not really cook much with the existing sauce. I discovered that tomato having two flavours in the sauce, lets both flavours complement each other. It seems like there are many possibilities, with more and less cooked things together.