Oven-roasted cauliflower and broccoli make this easy pasta recipe deeply flavorful. Parmesan cheese, garlic and bright lemon juice are all you really need to round out the salty-umami-tangy.
On a parchment-lined baking sheet, toss the broccoli with olive oil, salt, and pepper, making sure the oil and seasonings are evenly distributed. Make sure the vegetables are spread out evenly.
Place cauliflower in the oven and roast for 5 minutes; then add broccoli to the oven. Roast for 5 minutes more, and then stir both cauliflower and broccoli and rotate sheet pans.
Meanwhile, as vegetables roast, cook pasta according to package directions. Before draining the pasta, carefully reserve about 1 cup of pasta cooking water.
In a large serving bowl, toss the roasted vegetables with the cooked pasta. Sprinkle the parmesan, lemon juice, garlic, and salt evenly over the pasta mixture.