Warm quinoa salad with roasted asparagus, onion and golden beets

-1 cup dry quinoa -1/2 of a large onion -1 bunch of asparagus -1 large golden beet (or a regular red beet) -1 tbsp extra virgin olive oil -1/4 tsp salt -1/4 tsp pepper -1/4 tsp garlic powder -Preheat oven to 400 degrees -Place whole beet on cookie sheet or small baking dish (no need [...]