For fresh garden tomatoes: Preheat oven to 400 degrees. Chop tomatoes and add to a liquid measuring cup until you have 3 cups of chopped tomatoes. Spread tomatoes on a baking sheet and drizzle with a bit of olive oil and sprinkle with salt. Roast for 15-20 minutes and allow to cool before proceeding with the recipe. Alternatively you can use one 14.5 ounce can of diced tomatoes.
To a blender, add the roasted or diced tomatoes, tomato paste, sun-dried tomatoes (if you absolutely love tomato flavor you can add up to ¼ cup more sun-dried tomatoes), basil, oregano, rosemary, salt and garlic powder. Blend until smooth.
Add as much water as needed (about a cup) to make 3 ½ cups of liquid. The amount of liquid in different types of tomatoes will vary. This is the easiest way to standardize the recipe. My blender has measurements on the side so I know exactly how much water to add. If yours doesn’t have measurements, you could add the tomato mixture to a large liquid measuring cup (affiliate link) or measure the liquid as you pour it into your mixer and add enough water to make 3 ½ cups.
Double check that your tomato basil liquid is cool to the touch or lightly warm (you don’t want to do all that work and then kill the yeast).