Move oven rack to lowest position. Heat oven to 450°. Grease cookie sheet or 12-inch pizza pan. Mix baking mix and water until soft dough forms. Press dough into 12-inch circle on cookie sheet or press in pizza pan, using fingers dipped in baking mix; pinch edge to form 1/2-inch rim. Cook beef in 10-inch skillet over medium heat, stirring occasionally, until brown; drain. Stir in sloppy joe sauce. Spoon beef mixture over dough. Sprinkle with cheese. Bake 12-15 minutes or until crust is golden brown and cheese is bubbly. Top with tomatoes and green onion. 8 servings