Potato & Caramelized Onion Tart - Reese® Specialty Foods

Ingredients

• 1 jar Reese Caramelized Onions
• 2 large potatoes, thinly sliced
• 3 tbsp unsalted butter, melted
• 2 tbsp fresh thyme, chopped
• ½ cup cheddar cheese, grated
• ⅓ cup Parmesan cheese, grated
• ½ cup mozzarella cheese, grated
• Salt and pepper, to taste
• 1 (12-inch) square shortcrust pastry
• 1 red onion, finely sliced
• Large handful of parsley leaves, picked
• Splash of fresh lemon juice