a package for either conventional oven or microwave heating of refrigerated or frozen foodstuffs includes an outer paperboard container and an inner food carrying tray or dish . the bottom of the plastic tray rests on the container bottom . the dish is flanged , the flange provided with one or more ears extending downwardly and sandwiched between container side walls . the dish flange is polygonal , having one or more edges abutting respective one or more interior walls of the container . a portion of the top cover of the container is removed by ripping along tear lines . the tear or ripping lines yield four triangular corner sections on the remaining , unripped container top cover , these sections overlying portions of the tray flange . this arrangement prevents the tray from being removed from the container through the top cover access opening defined upon ripping . the construction permits the use of much thinner plastic for the tray since the paperboard container assists in supporting and rigidifying the tray during shipping , storage , and manual handling by the consumer .