
Fresh tomato sauce is the best way to use a surplus of tomatoes from your garden this summer with fresh basil and garlic. It also freezes well.
In a blender, blend the tomatoes, in batches as necessary, until an almost smooth pulp forms. Pour into a large bowl; there should be about 10 cups of puree.
In a large Dutch oven, melt the butter over medium-high heat. Add the garlic and cook until fragrant, about 30 seconds.
Stir in the tomato puree, salt, and pepper. Bring to a boil, stirring frequently. Reduce the heat to medium-low, and simmer until the sauce reduces by one-third, 45 minutes to 1 hour.
Remove the pot from the heat and stir in the oil and basil. Add salt to taste.