Cook quinoa in salted water according to package directions until fluffy; set aside to cool completely.
Roast beet at 400°F wrapped in foil for 45 minutes, or boil until tender. Let cool, then peel and dice.
In a large bowl, combine cooled quinoa, diced beet, chopped red pepper or celery, herbs, and green onion.
Add greens, pumpkin seeds, and feta to the bowl.
Drizzle with olive oil and lemon juice or ginger lime dressing.
Toss gently to combine all ingredients.
Season with salt to taste.
Serve immediately or refrigerate for 1 hour to chill before serving.