One-Pan Roasted Tomato Tagliatelle with Mozzarella Step-by-step instructions

Before you start

Before starting, bring a large pot of salted water to a boil for the pasta. Have all ingredients prepped: dice the tomatoes and peppers, crush the garlic, shred the mozzarella, and grate the parmesan.

Measure the olive oil, oregano, salt, and pepper. Set the basil aside to add at the end. This recipe comes together quickly once the sauce starts cooking, so having everything ready ensures smooth, relaxed cooking.

Instructions

Caramelize the Vegetables

1. 1Sauté the Aromatics
   Heat the olive oil in a large skillet over medium heat. Add the crushed garlic and cook, stirring, for 1 minute until fragrant but not browned. Add the diced plum tomatoes, bell peppers, oregano, salt, and black pepper. Stir to combine.
   Look for The garlic sizzles gently and the tomatoes start releasing their juices.
   Tip Keep the heat medium so the garlic doesn't burn and turn bitter.
2. 2Caramelize the Sauce
   Continue cooking the tomato-pepper mixture, stirring occasionally, for 12–15 minutes until the tomatoes have broken down and the mixture has thickened into a chunky sauce. The vegetables should be soft and starting to caramelize at the edges.
   Look for The sauce reduces and the oil separates slightly, showing a rich, deep color.
   Tip Taste and adjust seasoning now, before adding the pasta.

After this phase, the tomatoes and peppers should be soft and have released their juices, which have reduced into a thick, chunky sauce.

The garlic is fragrant, and the edges of the vegetables look slightly caramelized, with a deep red color. The sauce should be seasoned well, as the pasta will absorb some of the salt. Taste and adjust now.

Toss and Melt

3. 3Cook the Tagliatelle
   Bring a large pot of salted water to a boil. Add the tagliatelle and cook according to package directions until al dente. Reserve 1 cup of pasta water, then drain the pasta.
   Look for The noodles are tender but still firm to the bite.
   Tip Reserve more pasta water than you think you need; it's the key to a silky sauce.
4. 4Combine Pasta and Sauce
   Add the drained tagliatelle to the skillet with the tomato sauce. Toss with tongs to coat the noodles evenly. If the sauce seems dry, add splashes of reserved pasta water until it reaches a glossy consistency.
   Look for The pasta is fully coated in the red sauce, with no dry spots.
   Tip Toss over low heat to help the noodles absorb the sauce.
5. 5Melt the Cheeses
   Sprinkle the shredded mozzarella and grated parmesan over the pasta. Toss gently for 1–2 minutes until the cheeses melt and become stringy, creating a creamy, cohesive sauce.
   Look for The cheese pulls into long, stretchy strands as you toss.
   Tip Use low heat so the cheese melts slowly without clumping.

The tagliatelle is now coated in the sauce, and the mozzarella and parmesan have melted into a creamy, stringy mixture. The pasta looks glossy and well-coated, with no dry spots. The cheese pulls into long strands when lifted with tongs. The sauce should be loose enough to coat each noodle, but not watery. Add more pasta water if needed.

Finish and Serve

6. 6Finish with Basil
   Remove the skillet from the heat. Scatter the torn basil leaves over the pasta and toss once more to distribute. The residual heat will wilt the basil slightly.
   Look for The basil brightens the dish with its fresh aroma.
   Tip Add basil at the very end to keep its color and flavor vibrant.
7. 7Serve Immediately
   Twirl a generous portion of the tagliatelle onto each plate or into bowls. Make sure each serving gets plenty of the cheesy sauce and some of the caramelized tomatoes and peppers. Serve hot.
   Look for The cheese stretches as you twirl the fork.
   Tip Warm the plates beforehand to keep the pasta hot longer.

The basil is scattered and slightly wilted, adding a fresh green contrast. The pasta is ready to serve, with a rich, cheesy aroma and a beautiful presentation. Each forkful should twirl easily, with cheese stretching as you lift it. The dish is hot, fragrant, and ready to enjoy.

Common mistakes

A common mistake is overcooking the sauce until it becomes dry or pasty. The sauce should be loose enough to coat the pasta, so add pasta water as needed. Another pitfall is adding the cheese too early or over high heat, which can cause it to clump or become stringy in the wrong way.

Keep the heat low when melting the cheese and toss gently. Also, don't rinse the pasta after draining—the starch helps the sauce cling. Finally, don't skip the basil; it adds a fresh, aromatic contrast to the rich sauce.

How to tell it’s done

The dish is done when the tagliatelle is al dente—tender but still firm to the bite—and the sauce has thickened to coat the noodles generously. The mozzarella should be fully melted and stretchy, and the parmesan incorporated into a creamy, glossy sauce.

The tomatoes and peppers should be soft and caramelized, with a deep, sweet flavor. Taste a noodle to ensure it's seasoned well; add salt and pepper if needed. Serve immediately for the best texture and cheese pull.