Beef, Mushroom, and Onion Tart

(I know. If I had created the recipe, I would have named it something much more creative...There's just no 'scope for imagination' in this name, is there, Anne-fans?)

12 oz. lean ground beef
1 8-oz. pkg. sliced mushrooms
1/2 a medium red onion, cut in thin wedges
1/4 tsp. salt
1/4 tsp. ground black pepper
1 13.8-oz. pkg. refrigerated pizza dough
3 oz. blue cheese, crumbled
Fresh oregano and/or pizza seasoning (optional)

1. Heat oven to 425* F. Ina  12 inch skillet cook beef, mushrooms, and onion over medium heat about 8 minutes or until beef is browned and onion is tender, stirring occasionally. Drain off fat. Stir in salt and pepper.
2. Meanwhile, grease a large baking sheet or line with parchment. Unroll pizza dough on baking sheet. Roll or pat dough to a 15 x 12 inch rectangle. Top dough with beef mixture, keeping filling within 1 1/2 inches of all edges. Fold edges over the filling, pleating as needed.
3. Bake tart 15 minutes or until crust is golden. Top with blue cheese, oregano, and pizza seasoning. Serves 4.

From Better Homes and Gardens magazine, March 2010 issue