Unroll piecrust on a lightly floured surface; roll into a 12-inch circle.
Cut into 24 rounds using a 2-inch scalloped-edge round cutter. Press rounds into bottoms of ungreased miniature muffin cups. (Dough will come slightly up sides, forming a cup.) Prick bottom of dough once with a fork.
Bake at 425 for 4 to 5 minutes or until set. Cool in pans on a wire rack 15 minutes. Reduce oven temperature to 35
Meanwhile, drain tomatoes well, pressing between paper towels.
Combine tomatoes and chopped basil in a small bowl; season with desired amount of salt and pepper. Stir together mayonnaise and next 3 ingredients in a medium bowl. Divide tomato mixture among pastry shells, and top with mayonnaise mixture.
Bake at 350 for 18 to 20 minutes.
Serve immediately.
Garnish, if desired.
Note: To make ahead, bake and cool pastry shells as directed in Steps 1 and
Remove from muffin pans, and store in an airtight container up to 3 days. Return pastry shells to muffin pans, and fill and bake as directed.
