Oven-roasted cauliflower and broccoli turn a few simple ingredients into a deeply flavorful pasta. Parmesan, garlic, and bright lemon juice create a salty-umami-tangy balance that complements the caramelized vegetables. It’s deceptively simple—just a handful of ingredients that add up to big flavor. With so many roasted veggies folded into the dish, this is a true meal-in-one—perfect for busy weeknights or Meatless Monday.

This Recipe Is:   • Ready in 30 Minutes or Less • Includes Make-Ahead Steps • Vegetarian (see note) •

This recipe solves two common dinnertime problems: getting a flavorful main on the table quickly and packing in plenty of vegetables so you don’t need a separate side. The combination of roasted broccoli and cauliflower, garlic, lemon, and parmesan delivers more flavor than the short ingredient list suggests.

Video Tutorial

Looks fantastic, right? It tastes even better.

What struggles does this recipe address? First, it helps you add more vegetables to family meals without adding extra prep or cooking steps. And second, roasting makes vegetables irresistibly delicious—even picky eaters are more likely to eat them when they’re caramelized and golden.

This pasta includes a large amount of vegetables—8 cups each of broccoli and cauliflower—so it truly functions as a meal-in-one. The vegetables roast until browned and flavorful, then are tossed with whole wheat penne, reserved pasta water, parmesan, lemon juice, and garlic for a quick, satisfying dinner.

Why Roasting Works

Roasting concentrates flavor by creating browned, caramelized spots on the vegetable surfaces. That caramelization adds depth and a pleasant complexity that elevates a simple pasta. Roasted veggies often disappear quickly from the plate—kids and adults alike reach for more—so roasting is an easy way to boost vegetable intake without fuss.

The first time this pasta was made, it was a spontaneous mix of what was on hand. It became an immediate family favorite—and it’s easy to see why. The bright lemon, salty parmesan, and a touch of garlic come together with the deep roasted flavors of the vegetables to create an unexpectedly rich, balanced dish.

It’s a great meat-free option for Meatless Monday and comes together quickly with just a few pantry staples.

Shortcut Tips

To get this on the table in 30 minutes, buy pre-cut broccoli and cauliflower florets from the produce section. If some florets are larger than others, trim them briefly so pieces are uniform for even roasting. If you prefer whole heads, cut them into florets ahead of time and store them in the refrigerator for several days.

You can also mince the garlic and juice the lemon in advance to save a few minutes at dinner time.

These small shortcuts make prep nearly effortless and keep dinner stress-free. Roasting transforms the vegetables into something your whole family will enjoy.

Simple ingredients, big flavor—perfect for busy weeknights. Below is the recipe card with ingredients, instructions, and notes.

Roasted Broccoli and Cauliflower Pasta with Parmesan, Lemon and Garlic

Yield:
About 14 1/2 cups

Prep Time:
10 minutes

Cook Time:
20 minutes

Total Time:
30 minutes

This Roasted Broccoli and Cauliflower Pasta recipe is deeply flavorful yet simple. A satisfying, quick, meatless meal-in-one—perfect for busy nights.

•  Ready in 30 Minutes or Less  •  Includes Make-Ahead Steps  •  Vegetarian (see note)

Ingredients

• 8 cups broccoli florets (see note)
• 1/4 cup (4 tablespoons) extra virgin olive oil, divided
• 1 3/4 teaspoons kosher salt, divided
• 1/4 teaspoon black pepper, divided
• 8 cups cauliflower florets (see note)
• 12 ounces whole wheat penne pasta
• 1 cup reserved pasta cooking water
• 1 cup shredded parmesan cheese (see note)
• 3 tablespoons lemon juice
• 1 tablespoon minced garlic

Instructions

1. Preheat oven to 475ºF, and bring a large pot of water to a boil on the stove.
2. On a parchment-lined baking sheet, toss the broccoli florets with 2 tablespoons olive oil, 3/4 teaspoon salt, and 1/8 teaspoon pepper, making sure the oil and seasonings are evenly distributed. On a second parchment-lined sheet, toss the cauliflower florets with 2 tablespoons olive oil, 3/4 teaspoon salt, and 1/8 teaspoon pepper. Spread the vegetables so they roast, not steam.
3. Place cauliflower in the oven and roast for 5 minutes; then add broccoli. Roast for 5 minutes more, stir and rotate pans, then roast about 10 more minutes (about 20 minutes total for cauliflower and 15 minutes total for broccoli) until the vegetables develop golden brown spots. Remove and keep warm.
4. Meanwhile, cook pasta according to package directions. Before draining, reserve about 1 cup of the pasta cooking water.
5. In a large serving bowl, toss the roasted vegetables with the cooked pasta. Sprinkle the parmesan, lemon juice, garlic, and remaining 1/4 teaspoon salt over the pasta, stirring so the ingredients are evenly distributed. Loosen with reserved pasta cooking water as needed (about 1/2–3/4 cup is typical). Taste and adjust lemon juice, salt, and pasta water. Serve immediately.

Notes

Broccoli and cauliflower florets: For a 30-minute prep, buy pre-cut florets. If using whole heads, you’ll need about 6 medium stalks of broccoli and one medium-large cauliflower to yield 8 cups of each; cut them in advance if you prefer.

Parmesan: To keep the dish fully vegetarian, choose parmesan made without traditional animal rennet.

Make-ahead: Cut florets, mince garlic, and juice lemons ahead of time to shorten busy-weeknight prep. Store prepped vegetables in an airtight container in the fridge for several days.

Nutrition Information:

Yield: 8 servings
Serving Size: about 1 3/4 cups

Amount Per Serving:
Calories: 275
Total Fat: 12g
Saturated Fat: 3g
Cholesterol: 7mg
Sodium: 718mg
Carbohydrates: 35g
Fiber: 10g
Sugar: 5g
Protein: 13g

Nutrition information is an estimate and may vary with ingredient choices and preparation. Consult a professional for advice on allergies or dietary needs.