Prehat oven to 375º.
In a large frying pan, brown ground beef, drain.
Stir in tomatoes, corn, tomato sauce, olives, ketchup, onion and chili powder.
Simmer while preparing crust.
Seperate crescent dough into 8 triangles.
Place triangles in ungreased 8 or 9 inch square baking pan or deep 9 or 10 inch pie pan.
Press over bottom and up sides to form a crust.
Brush oil over crust and sprinkle with cornmeal.
Spoon hot mixture into crust and sprinkle with cheese.
Bake for 20-25 minutes until crust is golden brown.
To reheat, loosely covered with foil, and cook at 375º for 20-25 minutes until heated through.