Cook the quinoa according to package directions. Cool.
Peel and grate the garlic.
Peel and roughly chop the shallot.
Roughly chop the tomato and bell pepper.
Toss the quinoa with the grated garlic, chopped shallot, tomato and bell pepper.
In a small bowl, make the dressing by stirring together the olive oil and lemon juice. Season with salt and pepper.
Drizzle the dressing over the quinoa salad and toss to blend.
Sprinkle sliced scallions over the quinoa salad before serving.