Home Health-Fitness Detox: Asparagus, Spinach, and Quinoa Soup 2 tablespoons extra-virgin olive oil, plus more for garnish 2 large yellow onions, chopped 1 bunch asparagus tips 1 teaspoon salt, divided 2 tablespoons plus 3 cups water, divided 1/4 cup quinoa 1 bunch green chard (about 1 pound) 14 cups gently packed spinach (about 12 ounces), any tough stems trimmed 4 cups vegetable broth, store-bought or homemade Big pinch of cayenne pepper 1 tablespoon lemon juice, or more to taste