I love, love, love this dish! We're trying to eat healthy; I don't know if this qualifies, but it sure is delicious! And isn't it colorful and gorgeous? I've made this several times, and always love it. This is Giada De Lauentiis' recipe for Penne with Brown Butter, Arugula, and Pine Nuts. I alter the recipe by using toasted slivered almonds instead of the pine nuts and half the salt. It's so easy to make, but it has complex flavors. One bite might be more buttery, another more tangy, depending whether you get a tomato or capers in that forkful.
You can find the recipe at: http://www.foodnetwork.com/recipes/giada-de-laurentiis/penne-with-brown-butter-arugula-and-pine-nuts-recipe/index.html.