Caramelized Onion Pasta with Chili Oil Recipe

Introduction

This Caramelized Onion Pasta with Chilli Oil is a simple yet flavorful dish that combines sweet, slow-cooked onions with a spicy, aromatic chili oil. It’s perfect for a weeknight dinner when you want something comforting with a kick.

The image shows a plate of spaghetti seasoned with a light, glossy sauce, garnished with small pieces of dried red chili peppers and finely chopped herbs. The pasta appears to be cooked perfectly, with a slightly oily sheen that highlights the spices and gives it a flavorful appearance. The dish looks simple yet appetizing, suggesting a spicy and aromatic taste profile. Photo taken with an iPhone --ar 4:5 --v 7

Ingredients

  • 12 oz (340g) pasta of your choice (spaghetti, fettuccine, or penne works well)
  • Salt (for boiling pasta water)
  • 2 large onions, thinly sliced
  • 2 tablespoons olive oil
  • 1 tablespoon butter
  • 1 teaspoon sugar (optional, to help caramelize)
  • Salt and pepper, to taste
  • 1/4 cup olive oil
  • 1 tablespoon chili flakes (adjust based on preferred spice level)
  • 1 garlic clove, minced
  • 1/2 teaspoon smoked paprika (optional)
  • 1/2 teaspoon salt
  • Fresh parsley, chopped (optional)
  • Grated Parmesan cheese (optional)
  • Extra chili oil (optional)

Instructions

  1. Step 1: In a large skillet, heat 2 tablespoons olive oil and 1 tablespoon butter over medium-low heat.
  2. Step 2: Add the thinly sliced onions and a pinch of salt. Stir occasionally to ensure even cooking.
  3. Step 3: Sprinkle 1 teaspoon sugar, if using, to aid caramelization. Cook the onions for 25-30 minutes, stirring occasionally, until they turn a deep golden-brown. Set aside once done.
  4. Step 4: In a small saucepan, heat 1/4 cup olive oil over low to medium heat. Add the minced garlic and chili flakes.
  5. Step 5: Let the garlic infuse the oil for 1-2 minutes, stirring occasionally. Be careful not to burn the garlic.
  6. Step 6: Stir in 1/2 teaspoon smoked paprika (if using) and 1/2 teaspoon salt. Remove from heat and set aside.
  7. Step 7: Bring a large pot of salted water to a boil. Cook the pasta according to package instructions until al dente, usually 8-10 minutes.
  8. Step 8: Drain the pasta, reserving about 1/2 cup of the pasta cooking water.
  9. Step 9: Return the skillet with caramelized onions to medium heat. Add the cooked pasta and toss to combine. Add reserved pasta water a little at a time if needed to help coat the pasta evenly.
  10. Step 10: Pour the prepared chili oil over the pasta and toss again to evenly distribute the flavors.
  11. Step 11: Serve the pasta garnished with chopped fresh parsley and grated Parmesan cheese, if desired. Drizzle with extra chili oil for added spice.

Tips & Variations

  • Use yellow or sweet onions for a deeper caramel flavor.
  • Adjust chili flakes to control the heat level according to your preference.
  • Substitute butter with vegan butter or additional olive oil to make this dish dairy-free.
  • Add toasted pine nuts or walnuts for extra texture and nuttiness.
  • Fresh herbs like basil or oregano can be used instead of parsley for a different herbal note.

Storage

Store leftover pasta in an airtight container in the refrigerator for up to 3 days. When reheating, gently warm it in a skillet with a splash of water or olive oil to prevent sticking and maintain moisture. Avoid microwaving directly without adding moisture, as the pasta can dry out.

How to Serve

The image showcases a delicious plate of spaghetti pasta, garnished with fresh parsley leaves, finely grated cheese, and a generous sprinkle of red chili flakes. The pasta appears to be coated in a light sauce, possibly garlic-infused olive oil, with caramelized onion pieces adding a rich, savory depth to the dish. The combination of green herbs and red flakes creates a vibrant contrast against the creamy tones of the pasta, making it look both aromatic and flavorful. This simple yet elegant presentation highlights the classic Italian flavors in a visually appealing way. Photo taken with an iPhone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use pre-made chili oil instead of making my own?

Yes, pre-made chili oil can be used for convenience. Just adjust the amount based on your heat preference and skip the step of infusing garlic and chili flakes.

What pasta shape works best for this recipe?

Spaghetti, fettuccine, or penne are ideal because they hold the caramelized onions and chili oil well. However, feel free to use your favorite pasta shape.

Print

Caramelized Onion Pasta with Chili Oil Recipe

A flavorful and comforting Caramelized Onion Pasta tossed with a fragrant homemade chili oil, combining the sweetness of slow-cooked onions with the spicy kick of chili flakes. This easy-to-make pasta dish is perfect for a delicious weeknight meal or a cozy dinner, garnished with fresh parsley and Parmesan cheese for added richness.

  • Author: Felix
  • Prep Time: 10 minutes
  • Cook Time: 40 minutes
  • Total Time: 50 minutes
  • Yield: 4 servings 1x
  • Category: Main Course
  • Method: Stovetop
  • Cuisine: Italian
  • Diet: Vegetarian

Ingredients

Scale

Pasta

  • 12 oz (340g) pasta of your choice (spaghetti, fettuccine, or penne works well)
  • Salt (for boiling pasta water)

Caramelized Onions

  • 2 large onions, thinly sliced
  • 2 tablespoons olive oil
  • 1 tablespoon butter
  • 1 teaspoon sugar (optional, to help caramelize)
  • Salt and pepper, to taste

Chilli Oil

  • 1/4 cup olive oil
  • 1 tablespoon chili flakes (adjust based on preferred spice level)
  • 1 garlic clove, minced
  • 1/2 teaspoon smoked paprika (optional)
  • 1/2 teaspoon salt

Garnishes (Optional)

  • Fresh parsley, chopped
  • Grated Parmesan cheese
  • Extra chili oil

Instructions

  1. Cook the Onions: In a large skillet, heat the olive oil and butter over medium-low heat. Add the thinly sliced onions with a pinch of salt. Stir occasionally to help the onions cook evenly without burning.
  2. Caramelize the Onions: Sprinkle the optional sugar over the onions to aid caramelization. Continue cooking the onions for 25-30 minutes, stirring occasionally, until they turn a deep golden-brown color. This slow cooking process brings out their natural sweetness and rich flavor. Set aside once done.
  3. Prepare the Chilli Oil: In a small saucepan, heat 1/4 cup olive oil over low to medium heat. Add the minced garlic and chili flakes. Stir occasionally to infuse the oil with flavors for about 1-2 minutes, being careful not to burn the garlic.
  4. Finish the Chilli Oil: Add the smoked paprika (if using) and salt to the oil mixture. Stir well to combine, then remove from heat and set aside to cool slightly.
  5. Cook the Pasta: Bring a large pot of salted water to a boil. Add the pasta and cook according to package instructions until al dente, usually about 8-10 minutes.
  6. Drain Pasta: Drain the pasta, reserving about 1/2 cup of the pasta cooking water to help loosen the sauce later if needed.
  7. Combine Pasta with Onions: Return to the skillet used for cooking the onions, add the cooked pasta, and toss to combine with the caramelized onions. If the mixture seems dry, add some of the reserved pasta water a little at a time to create a cohesive sauce coating the pasta evenly.
  8. Add Chilli Oil: Pour the prepared chili oil over the pasta and toss again thoroughly, ensuring every strand or piece is coated in the spicy, flavorful oil.
  9. Serve: Plate the pasta and garnish with fresh chopped parsley and grated Parmesan cheese if desired. Drizzle extra chili oil over the top for additional heat and serve immediately while warm.

Notes

  • Cooking the onions slowly at a low temperature is key to achieving perfect caramelization and deep flavor.
  • The chili oil can be adjusted in spice level by modifying the amount of chili flakes used.
  • Reserved pasta water helps bind the oil and onions to the pasta, giving it a silky texture.
  • Parmesan cheese can be omitted for a vegan version or replaced with nutritional yeast.
  • This dish pairs well with a simple green salad or crusty bread.

Keywords: caramelized onion pasta, chili oil pasta, spicy pasta recipe, easy pasta dishes, vegetarian pasta, Italian pasta recipe

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