Wash the strawberries and blueberries thoroughly under cold water.

Pat all the fruit completely dry using paper towels. This is crucial to prevent the pretzels from getting soggy.

Hull the strawberries and slice them in half lengthwise.

On a large rectangular serving platter, place the blueberries in a dense rectangular block in the upper left-hand corner to represent the flag's stars.

Create alternating horizontal rows using the sliced strawberries for the red stripes and the yogurt-covered pretzels for the white stripes, starting with strawberries at the top.

Serve immediately, or cover lightly and keep in a cool, dry place until ready to serve.