Yes, it's easy to make this a macaroni and cheese with broccoli recipe. To include broccoli, add about 2-3 cups of fresh florets to the pasta when it has 2 minutes left to boil. Then drain with the pasta and continue with the recipe as directed. For frozen broccoli, stir into the cheese sauce right before you combine the sauce with the pasta. (Don't worry, the broccoli doesn't need to defrost or cook before the sauce and pasta are combined in the casserole dish.) Bake as directed.