Sweet Onion Tart – Fustini's Oils & Vinegars

Ingredients

• 2-3 onions, peeled & sliced
• Fustini’s Butter olive oil
• 1 sheet frozen puff pastry, thawed
• little flour for dusting
• ½ cup Fustini’s Balsamic Onion Jam
• 1/4 cup grated Parmesan
• 1 cup grated gruyere
• 2 large eggs
• 1/8 teaspoon freshly grated nutmeg
• Kosher salt and freshly ground pepper
• 2 teaspoons Fustini's Meyer Lemon olive oil
• 1/2 teaspoon grated lemon zest