Cut nectarines in half and remove pits; cut each half into 6 wedges. Core and halve yellow tomatoes and red tomatoes; cut each half into 4 wedges. Arrange on a platter.
Dressing
Whisk together olive oil, finely grated lemon zest, and lemon juice. Drizzle over salad.
Assembly
Sprinkle with light feta cheese, fresh basil leaves, coarse sea salt, and pepper.