Remove from heat. In the meantime, preheat oven to about 350 to 375 degrees and prepare patti shells for serving. If you are using frozen patti shells, the tops will be open. You may also be able to bake you own using puff pastry. With your index finger, crush excess pastry inside cavity of shell, being careful not to destroy or break outer walls of shell.
Fill shells with oyster sauce and replace center tops.
Place on cookie sheet and put in preheated hot oven. Bake about 7-10 minutes. These are delicious with anything or alone. If desired, sauce may be prepared the previous day. After removing from heat, pour filling into a glass bowl and allow to completely cool, uncovered.