In a large bowl, mix the oil, garlic, onion, and Italian seasoning together.
Wash and cut up tomatoes and add to the bowl with the oil and mix well.
Preheat oven to 300 degrees.
Line a baking sheet with parchment paper or spray with cooking oil.
Place tomatoes on the baking sheet and top with the basil and rosemary and sprinkle Jazzy salt (or salt and pepper) to taste over all.
Roast in the oven for about 2 hours. Increase the heat to 400 and roast another 20 minutes.
Once done, remove the pan from the oven and let cool for a few minutes. I used my food processor to puree to the desired consistency I liked. It only takes a few pulses. If you’d like it thinned down a bit, add a little bit of water. You can also use a blender to do the job.
Serve right away with your favorite pasta or meat dishes. Or, if making several pans at once, hot pack into hot jars and can for later use, which is what I typically do. Enjoy!!!
Warning: Your house will smell AMAZING!!! My husband’s mouth was watering!