# What You’ll Need:
→ Vegetables
01 - 2.6 pounds yellow onions, thinly sliced
→ Dairy & Cheese
02 - 5.3 ounces Gruyère cheese, grated
→ Pantry
03 - 2 tablespoons unsalted butter
→ Broth
04 - 5 cups high-quality beef or vegetable broth
# How To Make:
01 - Heat butter in a large heavy-bottomed pot over medium-low heat. Add sliced onions and a pinch of salt.
02 - Cook onions gently, stirring occasionally, until deeply caramelized and golden brown, about 30 to 35 minutes.
03 - Increase heat to medium, pour in broth, scraping up browned bits from the pot. Simmer uncovered for 10 minutes. Season to taste.
04 - Preheat oven broiler. Ladle soup into oven-safe bowls and top each with a generous handful of grated Gruyère cheese.
05 - Place bowls under the broiler for 2 to 3 minutes, until cheese is melted and bubbling.
06 - Serve immediately, optionally accompanied by sliced baguette.