→ Vegetables
01 - 3 large yellow onions, thinly sliced
02 - 3 cloves garlic, minced
→ Pasta
03 - 12 ounces dry fettuccine or linguine
→ Liquids
04 - 4 cups low-sodium vegetable broth
05 - 1/2 cup dry white wine
→ Dairy
06 - 2 tablespoons unsalted butter
07 - 1 cup shredded Gruyère cheese
08 - 1/4 cup grated Parmesan cheese
→ Seasonings
09 - 2 tablespoons olive oil
10 - 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
11 - 1 bay leaf
12 - Salt and black pepper, to taste
→ Garnish
13 - Chopped fresh parsley (optional)
14 - Extra Gruyère or Parmesan cheese for serving (optional)