Cook the quinoa according to package directions. Once cooked, fluff with a fork and set aside to cool slightly.
While the quinoa cooks, prepare the dressing. In the bottom of a large salad bowl, whisk together the olive oil, rice vinegar, soy sauce, sambal oelek, honey, grated ginger, chopped lemongrass (if using), and pepper until well combined.
Add the cooked quinoa, grilled corn kernels, and the remaining salad ingredients (peaches, basil, mint, cilantro, green onions, fresno chilies, tomatoes, and feta cheese) to the bowl with the dressing.
Gently toss all the ingredients together until everything is evenly coated with the dressing.
If serving immediately, top with sliced avocado, toasted pepitas, and micro greens.
Serve the salad warm or chilled, enjoying the explosion of flavors!