Breana Lai Killeen, M.P.H., RD, is a food editor, recipe developer ... bring to a boil over medium-high. Add cauliflower florets and stems and reserved broccoli stems; return to a boil over ...

You also needn’t stick to using just zucchini in the recipe, Mr. Volger said. You can substitute shredded vegetables such as carrots or beets, or leftover cooked broccoli, cauliflower ...

Swap options: Add 3 diced Roma tomatoes with the pasta and pesto, add chunks of red bell pepper with the broccoli and cauliflower, chop jarred roasted red peppers and stir them in when you add the ...