Place quinoa in a large microwave-safe bowl and microwave until piping hot, a couple of minutes. Remove from microwave and add kale, vegetable of choice, pesto, and a generous sprinkling of salt and pepper. Toss and taste, adding lemon juice as needed. (Lemon Pesto needs little or none; Kale-Walnut Pesto or store-bought basil pesto will need up to 3 tablespoons. Toss to coat again, taste, adjust flavorings, and serve.