I’d love your recipe for the tomato sauce when you get a chance to post it, and the technique for making the tomato powder!
Add the crushed tomatoes, and stew for 15 minutes. Adjust seasoning with salt and pepper. Adjust acidity with lemon juice and/or sugar to make the flavor pop. It doesn't take much lemon juice and/or sugar, but every batch of tomatoes is different.
I puree mine, strain it through a china cap (you can use a regular strainer) and can it in a water bath, following regular canning instructions. It can be canned as is, without straining, your preference.
/johnny
/johnny