This is my "go to" sauce in a pinch...and it is less expensive than many others. Even Cooks Illustrated gave it a good taste test.
So, I roasted some of my garden tomatoes...little salt and pepper and extra virgin olive oil. Roasted on 450 for about 20 minutes.
I had lot's of juices flowing out of them...threw it all in a pot with some fresh garden basil..and let it reduce. I later added some garden green beans...ground em up after they were tender. I also added one small can of organic tomato sauce and about 1 tsp of sugar..and more fresh basil when I finished it.