Recipe: Cauliflower and onion tart | Style at Home

Ingredients

• 1-¼ cups all-purpose flour
• 1 tbsp + 2 tsp cornstarch
• ¼ tsp salt
• 6 tbsp unsalted butter, cubed
• 1 egg
• 1 small head cauliflower, cored and cut into florets
• 3 tbsp extra-virgin olive oil, divided
• Salt and freshly ground black pepper to taste
• 1 large onion, halved lengthwise and thinly sliced
• 2 large eggs
• 10 oz cream cheese, softened
• ¼ cup sour cream
• ¾ cup whipping cream
• ¼ tsp freshly ground black pepper
• ⅛ tsp nutmeg
• 1 cup grated Gruyère cheese
• 1-½ tbsp Dijon mustard
• ¾ cup freshly grated Parmesan cheese