Many layer make this a satisfying winter dish suitable for a shared app or light dinner.
Ingredients:
1 tablespoon unsalted butter
2 cups chopped leeks
1 (14-ounce) can artichoke quarters, drained
1-2 heads roasted garlic (see recipe below)
3 tablespoons sun-dried tomato spread
1/4 teaspoon fresh thyme
Kosher salt
4 to 5 cups fresh spinach leaves
Ground black pepper
1 sheet puff pastry, chilled
1/3 cup freshly grated Parmigiano-Reggiano