Cook 1 cup of orzo in a large pot of salted water according to the package’s instructions, until al dente.
Drain and rinse under cold water to cool and prevent sticking.
Toast the pine nuts:
Heat a dry skillet over medium heat.
Add 1/4 cup pine nuts and toast, stirring frequently, until golden and fragrant, about 2-3 minutes.
Remove from heat immediately to avoid burning.
Make the vinaigrette:
In a small bowl or jar, whisk together 1/4 cup olive oil, 2 tablespoons lemon juice, 1 tablespoon balsamic vinegar, 1 teaspoon Dijon mustard, 1 teaspoon honey, and minced garlic.
Season with 1/4 teaspoon kosher salt and black pepper to taste.
Assemble the salad:
In a large mixing bowl, combine the cooled orzo, arugula, cherry tomatoes, Parmesan cheese, toasted pine nuts, and red onion (if using).
Toss and serve:
Drizzle the vinaigrette over the salad and toss gently to coat. Serve immediately for the freshest taste.
Notes
Cool the Orzo Properly: Rinse cooked orzo under cold water to stop cooking and prevent clumping.
Toast Pine Nuts Carefully: Toast over medium heat, stirring often, to bring out their nutty flavor without burning.
Balance the Dressing: Taste the vinaigrette before adding it to the salad and adjust the lemon juice or honey as needed.
Assemble Freshly: Toss the dressing with the salad just before serving to keep the arugula crisp.