Unroll dough on work surface. With sharp knife or pizza cutter, cut into 4 rectangles. Place rectangles on cookie sheet; press each to form 6x5-inch rectangle. In 10-inch skillet, melt butter over medium-high heat. Add chicken, onion and red pepper sauce; cook 4 to 6 minutes, stirring occasionally, until chicken is no longer pink in center. Remove from heat. Stir in tomatoes.