
1 sheet frozen puff pastry, thawed
All-purpose flour, for dusting
225g package cream cheese, at room temperature
1/3 cup sour cream
1/2 teaspoon finely grated lemon zest
1 teaspoon fresh lemon juice
1/4 teaspoon sugar
Kosher salt and freshly ground pepper
2 tablespoons finely chopped fresh chives,
plus more for topping
340g assorted small heirloom tomatoes, halved