Heat olive oil in a large skillet over medium heat. Add onions and cook stirring frequently until browned and caramelized, about 30-40 minutes.
3 tbsp olive oil, 3 yellow onions
Add garlic, thyme, sea salt, and pepper, and cook stirring for 2 minutes until fragrant. Add wine and dijon mustard, then scrape the bottom of the pan with a wooden spoon to deglaze for about 2 minutes.
3 garlic cloves, 1 tbsp fresh thyme, 1 tsp sea salt, 1/2 tsp ground black pepper, 1/2 cup dry white wine, 1 tbsp dijon mustard
Add pasta and broth. Simmer on medium high for 10-15 minutes until most of the broth is absorbed and the pasta is al dente. Stir occasionally so the pasta doesn't stick to the bottom. You can add a bit of water if the broth evaporates too quickly.
12 oz short pasta, 4 cups beef broth
Stir in heavy cream, smoked gouda, and parmesan, and simmer stirring for 1-2 minutes until the cheese is melted.
1/2 cup heavy cream, 1/2 cup shredded smoked gouda, 1/2 cup shredded parmesan
Taste to adjust seasoning, and serve warm garnish with more thyme.