8 ounces whole-wheat thin spaghetti, vermicelli or angel hair
1 tablespoon extra-virgin olive oil
2 cloves garlic, minced
1/3 cup chopped flat-leaf parsley
1/4 cup pitted chopped Spanish or Greek olives
2 tablespoons capers
1 teaspoon anchovy paste
1 tablespoon fresh oregano leaves or 1 teaspoon dried
1/8 teaspoon crushed red pepper flakes
1 (14-ounce) can diced tomatoes, preferably "no salt added"
3/4 cup chopped fresh arugula
1/4 cup grated Parmesan