Quinoa Pilaf with Curry Powder

Name: Quinoa Pilaf with Curry Powder
Ingredients: 1 cup Quinoa; 2 cups water; 1 large onion cut in half and sliced into thin semi circular slices; 1 red bell pepper finely diced; 1 green bell pepper , finely diced; 1 - 1.5 teaspoons curry powder; 1/4 teaspoon turmeric; 1/4 - 1/2 teaspoons cayenne or paprika powder, as per taste; 2-4 tablespoons Olive oil (dependign on how well done you want your onions); Salt to taste; chopped Cilantro for garnish; Lemon wedges for serving; 1/2 cup Walnuts