Rigatoni alla Genovese with Slow-Cooked Beef and Onions

Why You’ll Love This Recipe

• Classic Neapolitan comfort: a mountain of onions slow-cooked into a sweet, savory, beefy jam.
• Ridges of rigatoni catch every silky strand of sauce for perfect bites.
• Black pepper and Pecorino finish it with bold, peppery sparkle and salty depth.
• Make-ahead friendly: the sauce improves even more by day two.

Grocery List

• Produce: 4 lb sweet onions, 1 small carrot, 1 small celery stalk, thyme (optional), bay leaves
• Dairy: Unsalted butter, Pecorino Romano
• Pantry: Extra-virgin olive oil, kosher salt, black pepper, crushed red pepper (optional), dry white wine, low-sodium beef stock (or water), rigatoni, pancetta (optional)

Full Ingredients

For the Genovese (Onion-and-Beef) Sauce

• 2 tbsp extra-virgin olive oil (30 ml)
• 1 tbsp unsalted butter (14 g)
• 2 oz pancetta, finely diced (60 g, optional but traditional)
• 4 lb sweet onions, thinly sliced (1.8 kg; Vidalia, Spanish, or yellow)
• 1 small carrot, finely chopped (about 70 g)
• 1 small celery stalk, finely chopped (about 50 g)
• 2 lb boneless beef chuck, cut into 3–4 large pieces (900 g)
• 1 1/2 tsp kosher salt (9 g), plus more to taste
• 1 tsp freshly ground black pepper (2 g), plus more to finish
• 1/4 tsp crushed red pepper flakes (optional)
• 1 cup dry white wine (240 ml)
• 1 cup low-sodium beef stock or water (240 ml)
• 2 bay leaves
• 1–2 thyme sprigs (optional)

For the Pasta and Finish

• 1 lb rigatoni (450 g)
• 4 qt water + 2 tbsp kosher salt for boiling
• 1 cup finely grated Pecorino Romano, plus more for serving (about 70 g)
• Freshly ground black pepper, to taste
• Reserved pasta water as needed (240–360 ml)

Step-by-Step Instructions

Step 1: Slice and prep the mountain of onions

Peel and thinly slice 4 lb onions. Aim for even 1/8–1/4 inch slices so they break down uniformly. Finely chop the carrot and celery. Cut the chuck into 3–4 large pieces and pat dry with paper towels for better browning.

Step 2: Sweat the onions low and slow

In a heavy Dutch oven (5–7 qt), heat olive oil and butter over medium-low. Add pancetta (if using), carrot, celery, onions, and 1 tsp salt. Cover and cook 20 minutes to steam and soften. Uncover and continue cooking 25–35 minutes, stirring every 5 minutes. Keep heat low to maintain a gentle sizzle without browning; you want a sweet, pale-golden, jammy base.

Step 3: Brown the beef in the pot

Season beef with remaining 1/2 tsp salt and 1/2 tsp pepper. Push onions to the perimeter and increase heat to medium. Sear beef 3–4 minutes per side until lightly browned. If the pot is crowded, sear in two rounds. Stir in a pinch of red pepper flakes if using.

Step 4: Deglaze and begin the braise

Pour in the white wine and scrape up browned bits. Simmer 3–4 minutes to reduce by about half. Add stock (or water), bay leaves, and thyme. Return to a bare simmer—about 200–205°F. Cover with the lid slightly ajar or a parchment cartouche. Cook gently for 2 1/2–3 hours, stirring every 20–30 minutes and turning the beef occasionally. If the onions look dry, add a splash of water. The onions should melt into a thick, silky sauce and the beef should be fork-tender.

Step 5: Shred and glaze the sauce

Remove bay and thyme. Transfer beef to a board and shred into bite-size pieces. Return to the pot and simmer 10–15 minutes, uncovered, to thicken to a glossy, spoon-coating consistency. Taste and adjust salt and pepper. Keep warm on low.

Step 6: Boil the rigatoni

Bring 4 qt water to a boil and season with 2 tbsp kosher salt. Cook rigatoni until al dente, usually 10–12 minutes (or 1–2 minutes shy of package directions). Reserve 1–1 1/2 cups pasta water, then drain.

Step 7: Emulsify, pepper, and Pecorino

Add drained rigatoni to the sauce over low heat. Splash in 1/2–3/4 cup reserved pasta water and toss vigorously until the sauce clings to the ridges and looks glossy. Off heat, fold in 1/2 cup Pecorino Romano. Grind in plenty of black pepper. Plate and shower with more Pecorino to taste.

Pro Tips

• Keep it pale: Genovese is about sweet onion depth, not browned onions. Maintain a low flame so the onions melt without scorching.
• A parchment cartouche (paper lid) helps trap steam early on, then remove to reduce.
• Mix onion types (sweet + yellow) for complexity and balanced sweetness.
• Grate Pecorino very fine so it melts smoothly into the sauce without clumping.
• Use the pasta water: the starch helps emulsify beef drippings, onion sugars, and cheese into a silky coating.

Variations

• Beef swap: Use bone-in beef shank or short ribs (about 2 1/2 lb). Increase braise time to 3–3 1/2 hours until fork-tender; remove bones and shred.
• Slow cooker: Sweat onions and brown beef on the stovetop, then transfer to a slow cooker. Add wine and stock; cook 8–9 hours on Low. Finish in a pot to reduce if needed.
• Pressure cooker: After sweating and deglazing, pressure-cook 45 minutes on High, natural release 15 minutes. Shred, then simmer on Sauté to thicken.

Storage & Make-Ahead

The sauce keeps 4 days refrigerated in an airtight container and freezes well for up to 3 months. Reheat gently with a splash of water until loosened and glossy. Cook pasta fresh just before serving. Leftover dressed pasta can be refrigerated up to 2 days; rewarm with a little water and a fresh sprinkle of Pecorino.

Nutrition (per serving)

Approx. 900 calories; 85 g carbs; 42 g protein; 38 g fat; 6 g fiber; 1050 mg sodium. Values will vary with pancetta use and seasoning.