Heat oven to 375°F. Cook vegetables as directed on boxes. Pour into medium bowl; stir.
Separate dough into 8 biscuits. Press each to form 6-inch round on 2 ungreased large cookie sheets. Divide vegetables evenly over rounds; sprinkle with green onions. Top with cheese.
Bake 10 to 14 minutes or until bottoms are deep golden brown and cheese is melted and bubbly.