Caramelized Onion Tart StickySweet Gruyère Phyllo

Ingredients

• 2 tbsp (30ml) olive oil
• 2 lbs (900g) yellow onions, thinly sliced (about 4 large)
• 1 tsp (5g) packed brown sugar
• 1/4 tsp (1.5g) dried thyme
• 1/4 cup (60ml) dry red wine (or balsamic vinegar), optional
• 1/4 tsp (1.5g) salt, or to taste
• 1/4 tsp (1.5g) black pepper, or to taste
• 8 sheets phyllo dough, thawed (about 1/2 of a standard 1-lb package)
• 6 tbsp (85g) unsalted butter, melted
• 1/2 cup (50g) Gruyère cheese, grated
• Optional: Fresh thyme leaves, for garnish