In A Small Bowl, Combine The Oil, Celery Salt, Garlic Powder And Seasoned Salt. Add Pumpkin Seeds; Toss To Coat. Spread A Quarter Of The Seeds In A Single Layer On A Microwave-Safe Plate. Microwave, Uncovered, On High For 1 Minute; Stir. Microwave 2-3 Minutes Longer Or Until Seeds Are Crunchy And Lightly Browned, Stirring After Each Minute. Repeat With Remaining Pumpkin Seeds. Serve Warm, Or Cool Before Storing In An Airtight Container.