01 - Line a medium bowl (approximately 1.5-liter capacity) with plastic wrap, allowing for overhang to cover the top.
02 - Press softened ice cream into the lined bowl to create a smooth, even layer. Cover tightly with plastic wrap and freeze for at least 2 hours until solid.
03 - Cut pound cake into slices about 3/4 inch thick. Line a baking sheet with parchment paper.
04 - Remove ice cream dome from freezer, unwrap, and invert onto cake slices. Trim cake edges if necessary to match the size of the ice cream dome. Return assembled dome to freezer.
05 - Set oven to 425°F (220°C).
06 - In a clean bowl, beat egg whites with cream of tartar until soft peaks form. Gradually add sugar while beating until stiff, glossy peaks develop. Fold in vanilla extract.
07 - Remove the dome from freezer and quickly spread meringue evenly over entire surface, sealing all edges completely. Use the back of a spoon to create decorative swirls.
08 - Bake for 3 to 5 minutes until meringue turns golden brown, watching carefully. Alternatively, brown meringue with a kitchen torch.
09 - Slice immediately and serve.