To start, heat the extra virgin olive oil in a large pot over medium heat. Add the thinly sliced onions. Stir them occasionally. Patience is key here. You'll want to cook the onions for about 20-30 minutes, or until they're a lovely golden brown. This gradual caramelization develops their sweetness and transforms them into the flavor foundation for your pasta. If they start to stick, don’t hesitate to add a splash of water.

Once the onions are perfectly caramelized, pour in the red port wine. It’s time to deglaze the pot! Scrape any bits stuck at the bottom. This adds wonderful flavor to the mix. After the wine reduces for about 2-3 minutes, add the beef stock and the filtered water. The aroma coming from the pot is simply irresistible.

Now, season your broth with sea salt, black pepper, fresh thyme leaves, and crushed red pepper flakes. Bring this mixture to a gentle simmer. The combination of flavors is what makes this dish reminiscent of classic French onion soup.

Next, add your dried orecchiette directly into the pot. Cook the pasta according to the package instructions, stirring occasionally. You want the pasta to absorb some of that savory broth, so don’t skip this step! When it’s al dente, remove it from the heat.

Finally, stir in the grated Gruyère cheese while the pasta is still hot. Watch it melt into the broth. This is the magical moment! The cheese will make the broth creamy and dreamy. If you’re feeling extra indulgent, top off each serving with more cheese and broil it in the oven until bubbly.