Gorton's Beer Battered Fish Fillets

I got this bag of beer battered fish fillets at the Deals store for $5.00 and a local supermarket sells the same bags of fillet for $8.99, so it was a no-brainer for me. The fillets are pretty good in terms of taste [and smell]: pretty tender cuts of fish with juice/grease that develops from the thermal process in the oven. The only downside is that the batter outsides stick to the cooking surface [aluminum in my case]. I tried greasing the aluminum pizza dish with oil, but the battered sides get stuck on the dish at random: some turn okay and some not. Really convenient to have a bag laying in the freezer.