Whole-Wheat Spaghetti with Swiss Chard and Pecorino Cheese

This dinner came together so fast, and I was able to use the Swiss red chard, onions, and garlic from my CSA bag. The result is such a simple pasta dish, light and full of fresh flavor with a touch of heat, and using whole-wheat spaghetti keeps it on the healthier side. 

Source: Whole-Wheat Spaghetti with Swiss Chard and Pecorino Cheese, Giada de Laurentiis

Ingredients
1 tablespoon olive oil
2 onions, thinly sliced
2 bunches Swiss chard, trimmed and chopped (about 14 cups)
3 garlic cloves, minced
1 (14 ½-ounce) can diced tomatoes with juices
¼ cup dry white wine
¼ teaspoon dried crushed red pepper flakes
Salt and pepper
8 ounces whole-wheat spaghetti
¼ cup pitted kalamata olives, coarsely chopped
2 tablespoons freshly grated Pecorino cheese
2 tablespoons toasted pine nuts

Directions
Heat the oil in a heavy large frying pan over medium heat. Add the onions and sauté until tender, about 8 minutes. Add the chard and sauté until it wilts, about 2 minutes. Add the garlic and sauté until fragrant, about 1 minute. Stir in the tomatoes with their juices, wine, and red pepper flakes. Bring to a simmer. Cover and simmer until the tomatoes begin to break down and the chard is very tender, stirring occasionally, about 5 minutes. Season the chard mixture, to taste, with salt and pepper.

Meanwhile, bring a large pot of salted water to a boil. Add the spaghetti and cook until tender but still firm to the bite, stirring frequently, about 8 to 10 minutes. Drain the spaghetti. Add the spaghetti to the chard mixture and toss to combine.

Transfer the pasta to serving bowls. Sprinkle the olives, cheese, and pine nuts and serve.