Step 1

Cook oil, shallot, garlic, and red pepper flakes in a small saucepan over medium heat, stirring occasionally, until shallots and garlic begin to turn golden, 7–9 minutes. Remove from heat and mix in anchovies, if using (they’ll dissolve in the oil quickly), and basil.

Step 2

Toss tomatoes with vinegar and a pinch of kosher salt in a medium bowl. Transfer to a platter and pour warm dressing over. Finely grate lemon zest on top and sprinkle with sea salt.