Heat oven to 375°F. Cook frozen vegetables as directed on package. Drain.
In large saucepan, combine cooked vegetables and all remaining ingredients except crescent rolls and additional parsley. Cook over medium heat until mixture is bubbly and thoroughly heated, stirring occasionally.
Meanwhile, separate dough into 8 triangles. Place 2 triangles together, stacking one on top of the other; press together slightly. (If necessary, gently press triangles until 6 inches long). Repeat with remaining dough. Place triangles on ungreased cookie sheet. Bake triangles at 375°F. for 9 to 12 minutes.
To serve, spoon hot chicken mixture into ungreased 12x8-inch (2-quart) baking dish. Arrange warm triangles, side by side, on top of chicken mixture, alternating short sides of triangles. Sprinkle with additional parsley.