Rigatoni with Asparagus Pesto and Ricotta Salata

This innovative variation on classic pesto calls for fresh asparagus and walnuts, making it a perfect dish to welcome in springtime. The addition of spinach gives the pesto its bright green color. Like other pesto-based pasta dishes, this one tastes great served warm or cold, making it a good choice for a picnic or buffet. For a more colorful dish, add some yellow and red cherry tomatoes just before serving.