Using a box grater over a bowl, grate the tomatoes down to the skin, discarding the skin as you go. Add the lemon, basil, and garlic and stir to combine. Add the salt, a little at a time, tasting as you go.
Let the entire mixture sit for at least one hour before serving. During this time I usually cook pasta separately (from scratch or a box). Before combining, don't heat the sauce, just serve the pasta and the sauce together either slightly chilled or at room temperature.