Slow-Simmered Roasted Tomato Beef Ragu with Tagliatelle

This slow-simmered roasted tomato beef ragu is the kind of dinner that makes everyone lean in for a second twirl of pasta. Deeply caramelized ground beef, sweet vegetables, and a rich tomato sauce come together with fresh tagliatelle, parmesan, and melted mozzarella.

It is a bowl of pure comfort, ready in about an hour and a half, but tasting like it simmered all day. The sauce clings to every ribbon, and the fresh basil adds a bright finish.

This slow-simmered roasted tomato beef ragu is a celebration of patience and simple ingredients. Ground beef is seared until deeply browned, then simmered with carrots, celery, onion, and garlic in a rich roasted tomato sauce.

Fresh tagliatelle is tossed directly into the sauce with pasta water, parmesan, and mozzarella, creating a silky, clingy coating. It is a classic Italian-American comfort dish that feels special enough for a Sunday dinner, yet simple enough for a weeknight.

Ingredients

Why this recipe works

The magic of this ragu lies in the caramelization. Searing the ground beef until it is deeply browned builds a savory foundation, while the vegetables — carrot, celery, and onion — are cooked until they soften and sweeten.

This browning, known as the Maillard reaction, creates complex flavors that no amount of seasoning can replicate. Simmering the sauce slowly allows these flavors to meld and deepen, resulting in a rich, hearty sauce.

Tossing the pasta directly into the sauce with a splash of pasta water is a technique borrowed from professional kitchens.

The starchy pasta water helps the sauce emulsify and cling to the noodles, while the cheese melts into a creamy, glossy coating. This method ensures every strand of tagliatelle is evenly coated, making each bite as flavorful as the last.

Notes and substitutions

For the best flavor, choose a high-quality roasted tomato sauce — or make your own by roasting tomatoes with olive oil and garlic. The sauce is the backbone of the dish, so it is worth using one with deep, sweet tomato flavor. If you prefer a chunkier ragu, you can crush whole tomatoes by hand instead of using a smooth sauce.

Fresh tagliatelle is ideal here because it cooks quickly and has a delicate texture that absorbs the sauce beautifully. If using dried pasta, cook it until al dente and reserve extra pasta water — you may need a bit more to loosen the sauce. Fresh mozzarella adds creamy pockets of cheese, but low-moisture mozzarella also works well.

• fresh tagliatelle: dried tagliatelle or fettuccine — cook according to package directions until al dente, reserving pasta water.
• roasted tomato sauce: high-quality marinara sauce plus 1 tablespoon tomato paste for depth.
• ground beef: ground pork or a mix of beef and pork for a richer flavor.
• fresh mozzarella: low-moisture mozzarella, cubed — it melts more smoothly.

Equipment

• Large heavy-bottomed pot or Dutch oven
• Wooden spoon
• Chef's knife
• Cutting board
• Measuring cups and spoons
• Large pot for pasta
• Tongs
• Box grater or microplane