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French Onion Pasta Bake Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.2 from 56 reviews
  • Author: Claire
  • Prep Time: 20 minutes
  • Cook Time: 50 minutes
  • Total Time: 1 hour 10 minutes
  • Yield: 4 servings
  • Category: Main Course
  • Method: Baking
  • Cuisine: French

Description

This French Onion Pasta Bake combines the rich, savory flavors of caramelized onions and melted Gruyère cheese with tender pasta for a comforting and elegant one-dish meal. Featuring a creamy beef broth and heavy cream sauce, it’s baked to bubbling perfection with a golden, cheesy crust.


Ingredients

Scale

Pasta Bake Ingredients

  • 8 oz pasta (such as penne or rigatoni)
  • 3 large onions, thinly sliced
  • 3 tbsp butter
  • 3 cloves garlic, minced
  • 2 cups beef broth
  • 1/2 cup heavy cream
  • 1 1/2 cups shredded Gruyère or mozzarella cheese
  • 1/2 cup grated Parmesan cheese
  • Salt, to taste
  • Black pepper, to taste
  • 1 tsp fresh thyme leaves (optional)


Instructions

  1. Cook the Pasta: Bring a large pot of salted water to a boil. Add the pasta and cook according to the package instructions until al dente. Drain the pasta and set aside.
  2. Caramelize the Onions: In a large pan over medium-low heat, melt the butter. Add the thinly sliced onions and cook slowly, stirring occasionally, until they become deeply golden and caramelized, about 25-30 minutes. This step builds the rich flavor base of the dish.
  3. Sauté the Garlic: Add the minced garlic to the caramelized onions and cook for an additional minute until fragrant.
  4. Prepare the Sauce: Pour in the beef broth and heavy cream. Stir and let the mixture simmer gently for 3-5 minutes to reduce slightly and meld the flavors together.
  5. Combine Pasta and Sauce: Add the cooked pasta to the pan with the onion sauce and toss well to ensure every piece is coated. Season with salt, black pepper, and fresh thyme if using.
  6. Assemble the Bake: Transfer the pasta mixture into a greased baking dish. Evenly sprinkle the shredded Gruyère (or mozzarella) and grated Parmesan cheeses over the top.
  7. Bake: Preheat the oven to 375°F (190°C). Bake the dish for 15-20 minutes until the cheese is completely melted, bubbly, and golden brown on top.
  8. Serve Warm: Remove from the oven and let it cool for a few minutes before serving. This pasta bake is perfect as a comforting main course.

Notes

  • For a vegetarian version, substitute beef broth with vegetable broth.
  • Use Gruyère for a classic French flavor; mozzarella can be used for a milder taste.
  • If you prefer a richer dish, add extra cheese or a splash more cream.
  • Make sure to caramelize the onions slowly to develop deep flavor without burning.
  • Fresh thyme is optional but adds a lovely herbal note.
  • This dish can be prepared ahead of time, assembled, and baked just before serving.