Step 1

Cook the potatoes in generously salted boiling water until fork-tender but not falling apart, about 20 minutes. Drain well and allow to cool completely. Cut in half crosswise.

Step 2

Fill a pastry bag, fitted with a small star tip, with the herbed cheese spread. Cut a piece of parchment large enough to fit a 12- by -17 1/2-inch wooden cutting board. Put a dab of cheese spread on the underside of each corner of the parchment to help it adhere to the cutting board.

Step 3

Pipe and spread a thin layer of cheese spread in to a 6 1/2- by -9 1/2-inch rectangle in the upper left corner of the parchment. Arrange the potatoes in rows, cut-side-up, on top of the cheese. Pipe the remaining cheese in between the potatoes to make stars for the flag.

Step 4

Drizzle the remaining empty portion of parchment with half of the oil then sprinkle all over with the basil. Starting from the top, make a line of tomato halves, cut-side-up, followed by a line of mozzarella halves, cut-side-down. Repeat with the remaining tomatoes and mozzarella. Drizzle everything with the remaining olive oil and sprinkle with salt.