Frozen Food Trays Put in Garbage Recycle Only the Tray Remove the plastic film from the microwavable tray before recycling the tray. The film covering trays is usually contaminated with food, which cannot be recycled: only clean plastic film can be recycled with plastic bags. Clean Before Recycling Before you recycle your microwavable tray, rinse it out because food is a contaminant in plastic recycling. Ways to Reduce Create Your Own Frozen Dinners Frozen dinners can be more expensive than preparing that same meal by hand. To save on money and time, consider making dinners in bulk at the beginning of the week, which helps reduce how much waste that’s generated from frozen dinners. See these helpful tips. Did You Know? Frozen Food Trays: Now More Eco-Friendly Recycled plastic can now be used to make frozen food trays. ConAgra Foods and Associated Packaging Technologies partnered to use a new technology that cleans recycled plastic. Before this technology was available, regulations limited companies like ConAgra to only using new plastic for food trays.