Cook bacon until crisp. Set aside. Roll out each can of crescent rolls into one big rectangle per can. Place each on a piece of wax paper. Spread sour cream on each rectangle. Sprinkle onion salt on each rectangle. Sprinkle bacon which has been broken up on each rectangle.
Roll into a long roll and roll waxed paper around it. Put in freezer until set and easy to slice or you can leave it overnight.
Remove from freezer and let thaw just enough to cut. Cut into 1/2 inch pieces. Lay on cookie sheet. Bake at 350 degrees about 15 minutes or until light brown. Serve.