Start by gathering or buying 10 tomatoes
Get a big pot of water to a boil
Core them and then slilce an " X" on the bottom to score it with a knife
Get an ice bath ready ( Bowl of mostly ice and enough water to cover ice )
Place half the tomatoes into the boiling water for 90 seconds
Put immediately into ice bath
Do the rest of the tomatoes
Dump water out of pot and place back on stove. Heat off
Once all tomatoes are in the ice bath for a few minutes, remove one at a time and slide the skin right off. Place back into large pot.
On the side, place the grape tomatoes ( Skin on ) in a pan with a little bit of avoado oil spray. Once they have roasted for a few minutes add the chopped onions and cook until translucent
Add chopped onions and balsamic vinegar
Mash the skinned tomatoes and add grape tomatoes and onions into large pot. Take either a hand held masher or immersion blender and mash and or blend tomatoes and onions ( if you do not have an immersion blender you can use a regular blender and blend then pour back into pot )
Season tomatoes with salt , pepper, italian seasoning, oregano , parsley and fresh basil.
Place on low and or simmer for 2-3 hours until the tomatoes thichen into a wonderful sauce.
You can either keep it as a thick sauce or add water, chicken stock or vegetable sauce to loosen.
Season if needed with more salt and pepper to taste.