Heat oven to 375°F. Remove crusts from pouches. On lightly floured surface, unroll and stack crusts one on top of the other. Roll to 18x12-inch rectangle. Fit crust into ungreased 15x10x1-inch pan, pressing firmly into corners and sides, stretching dough to fit, if necessary. Fold extra crust underneath and slightly on top edges of pan. Flute or crimp edges. Bake 7 minutes.