Bring a large pot of salted water to a boil. Add the asparagus and cook until tender-crisp, about 3-5 minutes. Remove with a slotted spoon and rinse under cold water to stop the cooking. Chop the asparagus into 1/2 inch pieces.
While the asparagus cooks, add the couscous to the boiling water and cook according to package directions. Drain the couscous and rinse under cold water. Place the drained couscous in a large mixing bowl.
Add the chopped asparagus, quartered grape tomatoes, minced red onion, lemon juice, olive oil, and minced parsley to the bowl with the couscous. Toss gently to combine.
Season with kosher salt and freshly cracked black pepper to taste. Toss again.
Serve the salad at room temperature or chilled. It pairs well with grilled chicken or fish, or as a light side dish.
Notes
This salad is best enjoyed fresh but can be stored in an airtight container in the refrigerator for up to 2 days. The flavors meld beautifully over time.