1Lightly grease cookie sheet with shortening or cooking spray. In medium bowl, stir together water, yeast, Bisquick mix, oregano, 1/4 cup of the onion and 3 teaspoons of the oil (dough will be soft).
2Sprinkle work surface with Bisquick mix. Place dough on surface; roll to coat. Knead gently about 20 times, adding a small amount of Bisquick mix if dough sticks to surface, until smooth.
3Pat dough on cookie sheet into 10-inch round. Sprinkle remaining onion over dough. Brush remaining teaspoon oil over onion and dough. Cover; let rise in warm place about 1 hour or until doubled in size.
4Heat oven to 400°F. Bake 14 to 17 minutes or until light golden brown. Immediately remove from cookie sheet to cooling rack. Serve warm or cool.