Combine the garlic, basil, olive oil, balsamic vinegar, Dijon mustard, lemon juice salt and pepper in a large dish. Stir together. Toss in sliced tomatoes. Cover and refrigerate for a minimum of 30 minutes and up to 12 hours (1-2 hours is the perfect time!).
To make the ricotta, combine the ricotta, olive oil, basil, salt, garlic clove and basil in a food processor. Blend until smooth. Taste and add more salt or basil as desired. Refrigerate until ready to serve.
To make the toast, spread a generous layer of the basil ricotta on a piece of toasted sourdough bread. Top with sliced tomatoes and a sprinkle of sea salt. Enjoy!