Caramelised Red Onion & Anchovy Pasta with Gremolata Recipe
Introduction
This caramelised red onion and anchovy pasta with gremolata is a flavorful dish that balances sweet, savory, and fresh notes beautifully. The slow-cooked onions and anchovies create a rich sauce, while the vibrant gremolata adds a bright finish. It’s a simple yet impressive meal perfect for any weeknight or special occasion.

Ingredients
- 2 tbsp olive oil
- 3 red onions, thinly sliced
- 200g pappardelle (or any long pasta)
- 2 anchovy fillets in oil, drained
- 2 tbsp tomato purée
- 1 lemon, zested and juiced
- 15g parsley, roughly chopped
- 2 garlic cloves, finely chopped
Instructions
- Step 1: Heat the olive oil in a large, heavy-based frying pan over medium heat. Add the thinly sliced red onions with a large pinch of salt. Cook gently for 30-35 minutes over medium-low heat, stirring often, until the onions are caramelised and golden.
- Step 2: While the onions cook, prepare the gremolata by mixing the lemon zest, lemon juice, chopped parsley, garlic, and a pinch of salt in a small bowl. Set aside.
- Step 3: Cook the pappardelle according to the package instructions. Reserve 120ml of the pasta cooking water before draining.
- Step 4: When the onions are caramelised, add the anchovy fillets to the pan and cook until they dissolve into the sauce.
- Step 5: Stir in the tomato purée and add about 15 twists of black pepper (approximately ½ tsp). Cook for 4-5 minutes until the sauce darkens slightly.
- Step 6: Add the cooked pasta and reserved pasta water to the sauce. Stir well to combine everything evenly.
- Step 7: Transfer the pasta to a serving platter and spoon the gremolata over the top before serving.
Tips & Variations
- For a milder onion flavor, rinse the sliced onions briefly in cold water before cooking.
- If you prefer less saltiness, reduce the quantity of anchovies or rinse them slightly before adding.
- Try substituting the pappardelle with tagliatelle or fettuccine for a similar texture.
- Add a sprinkle of grated Parmesan cheese when serving for extra richness.
- Use fresh herbs like basil or cilantro in the gremolata for a different aromatic twist.
Storage
Store leftover pasta in an airtight container in the refrigerator for up to 2 days. Reheat gently in a pan with a splash of water or olive oil to loosen the sauce. The gremolata is best added fresh before serving, so keep it separate during storage.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use other types of pasta for this recipe?
Yes, any long pasta like tagliatelle, fettuccine, or spaghetti will work well with this sauce. Just adjust cooking times according to the package.
How can I make this dish vegetarian?
To make a vegetarian version, omit the anchovy fillets. You can add a pinch of smoked paprika or a splash of soy sauce to enhance umami flavors in the sauce.
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Caramelised Red Onion & Anchovy Pasta with Gremolata Recipe
- Total Time: 50 minutes
- Yield: 2–3 servings 1x
Description
A flavorful pasta dish featuring caramelised red onions and anchovies, tossed with pappardelle and topped with a fresh lemony gremolata. The slow-cooked onions add sweetness and depth while the anchovies lend a savory umami punch, all balanced by the bright, herby gremolata.
Ingredients
Main Ingredients
- 2 tbsp olive oil
- 3 red onions, thinly sliced
- 200g pappardelle (or any long pasta)
- 2 anchovy fillets in oil, drained
- 2 tbsp tomato purée
Gremolata
- 1 lemon, zested and juiced
- 15g parsley, roughly chopped
- 2 garlic cloves, finely chopped
- Pinch of salt
Instructions
- Caramelise the onions: Heat 2 tablespoons of olive oil in a large, heavy-based frying pan over medium heat. Add the thinly sliced red onions with a large pinch of salt. Cook over medium-low heat for 30 to 35 minutes, stirring often, until the onions become golden and caramelised.
- Prepare the gremolata: While the onions cook, combine the lemon zest, lemon juice, roughly chopped parsley, finely chopped garlic, and a pinch of salt in a bowl. Mix well and set aside to let the flavors meld.
- Cook the pasta: Boil the pappardelle according to the package instructions. Before draining, reserve 120ml of the pasta cooking water to use in the sauce.
- Add anchovies and tomato purée: Once the onions are caramelised, add the drained anchovy fillets to the pan. Stir them into the onions until they dissolve completely. Then, add 2 tablespoons of tomato purée and approximately 15 twists of black pepper (about ½ teaspoon). Cook this mixture for 4 to 5 minutes until it darkens and thickens slightly.
- Toss pasta with sauce: Add the cooked pappardelle and the 120ml reserved pasta water to the pan with the onion and anchovy sauce. Stir everything together well so the pasta is evenly coated with the sauce.
- Serve with gremolata: Transfer the pasta to a serving platter and spoon the fresh gremolata over the top just before serving for a bright, fresh finish.
Notes
- Cooking the onions slowly is key to developing their natural sweetness and achieving perfect caramelisation.
- Anchovies dissolve into the sauce, adding savory depth without a fishy taste.
- Reserve some pasta water as it helps loosen the sauce and bind it to the pasta.
- Gremolata adds a fresh, zesty contrast to the rich pasta.
- You can substitute pappardelle with any long pasta such as tagliatelle or fettuccine.
- Prep Time: 10 minutes
- Cook Time: 40 minutes
- Category: Pasta
- Method: Stovetop
- Cuisine: Italian
Keywords: caramelised onion pasta, anchovy pasta, pappardelle recipe, Italian pasta, gremolata pasta, easy pasta dishes

