Whole-wheat Spaghetti with Sautéed Leeks, White Beans, and Walnuts
1. Heat oil in large saucepan over medium-high heat. Add leeks, bell pepper, and red pepper flakes; sauté 10 minutes, or until vegetables begin to brown. Stir in beans, vegetable broth, and garlic. Reduce heat to low, and simmer 5 minutes. Season with salt and pepper, if desired.
2. Meanwhile, cook spaghetti according to package directions until al dente, about 7 minutes. Drain. Divide spaghetti among 4 bowls or plates. Spoon sauce over each serving of pasta, and sprinkle with feta cheese, if desired, and walnuts.