Variants and Tips

If you have prepared the onions in advance, heat them in a pan adding a bit of pasta cooking water and sauté the al dente cooked spaghetti for a minute, finally stir in the grated parmesan.

If you have prepared the onions in advance, heat them in a pan adding a bit of pasta cooking water and sauté the al dente cooked spaghetti for a minute, finally stir in the grated parmesan.

You can also cook the onions in a pan instead of the oven: place all the ingredients in a pan, cover, and let them cook.

If you liked this recipe, you might also be interested in Four Tomato Pasta or Zucchini and Pecorino Pasta or Genoese Pasta.