01 - Rinse quinoa in a fine-mesh strainer under cold water. In a medium saucepan, combine quinoa, water, and salt. Bring to a boil, reduce heat to low, cover, and simmer for 15 minutes or until water is absorbed. Remove from heat, fluff with a fork, and let cool to room temperature.
02 - Preheat a grill or grill pan over medium-high heat. Lightly oil the grates to prevent sticking.
03 - Grill pineapple rings for 2–3 minutes per side, or until charred and caramelized. Transfer to a cutting board and dice into bite-sized pieces.
04 - In a large bowl, combine cooled quinoa, grilled pineapple, cherry tomatoes, cucumber, red onion, basil, and cilantro.
05 - In a small bowl, whisk together olive oil, lime juice, honey, Dijon mustard, salt, and pepper until emulsified.
06 - Pour the dressing over the salad and toss gently to combine. Sprinkle with toasted nuts and feta cheese if desired. Serve immediately or chilled.