01 - Rinse quinoa under cold running water. Combine with 2 cups water and 1/4 teaspoon salt in a medium saucepan. Bring to a rolling boil, then reduce heat to low, cover tightly, and simmer 12 to 15 minutes until all liquid is absorbed. Remove from heat, fluff with a fork, and allow to cool to room temperature.
02 - Preheat a grill or grill pan over medium-high heat. Lightly brush the cut sides of each apricot half with olive oil. Place cut-side down on the grill and cook 2 to 3 minutes until distinct grill marks form and the fruit softens slightly. Let cool briefly, then slice each half into wedges.
03 - In a small bowl, whisk together the extra-virgin olive oil, lemon juice, honey or maple syrup, Dijon mustard, salt, and pepper until fully emulsified and smooth.
04 - In a large mixing bowl, combine the cooled quinoa, cherry tomatoes, red onion, cucumber, and arugula. Add the grilled apricot wedges and torn basil leaves.
05 - Drizzle the dressing over the salad and toss gently to coat evenly. Scatter toasted almonds or pine nuts and crumbled feta cheese over the top if desired.
06 - Taste and adjust salt and pepper as needed. Serve at room temperature or lightly chilled.