Sweet Cucumber Peach Basil Salad

Whisk together 2 tbsp each lemon juice, red wine vinegar, and Dijon mustard with 1 tsp each salt and pepper in a medium bowl. While whisking, slowly drizzle in 1/3 cup olive oil until emulsified. Add 6 cucumbers (halved lengthwise and sliced into half-moons – about 3 cups), 2 medium peaches (pitted, cut into wedges, and sliced crosswise – about 2 cups), and 3/4 cup thinly sliced sweet onion. Let stand 10 minutes. Stir in 3/4 cup crumbled feta cheese and 1/2 cup torn fresh basil leaves and serve.