Lemony Pasta Salad With Cucumber

Name: Lemony Pasta Salad With Cucumber
Ingredients: 1 pound short pasta (such as radiators, orecchiette, gemelli); 1 teaspoon kosher salt, plus more for cooking pasta; 6 Tablespoons olive oil, divided, plus more for serving; 2 Tablespoons whole-grain mustard; 1 Tablespoon lemon zest plus 6 Tbsp fresh lemon juice (2 lemons), plus 1 lemon half for serving; 2 cloves garlic, finely chopped or grated; ½ teaspoon black pepper; ½ teaspoon crushed red pepper; 1 pound Persian cucumbers, sliced; 8 ounces feta cheese, crumbled; 1 cup packed fresh cilantro leaves and tender stems; ½ cup packed fresh mint leaves, torn if large