During the summer, it’s easy to turn into an impulse buyer. How can you not come home from the store or farmers’ market with more than you need when there’s all that irresistible produce out there? Freezing is one way to handle the excess. Getting creative in the kitchen is another way. Start by looking at a recipe, then mix it up a little. Before long you’ll find yourself throwing things like broccoli rabe into the food processor with nuts, a few garlic cloves and olive oil. Voila! Broccoli Rabe Pesto. Just like there aren’t any rules that say pesto has to be made with cheese, there aren’t any rules that say pesto has to be made out of herbs.