If you're unsure of how well something will freeze, then freeze a single serving when you prepare the dish for a regular family meal. This way you can check on how well the item holds up to freezing and reheating. The following lists should give you a good start at identifying potential freezing problems with various food items.
Raw vegetables lose their crispness, but can be used for cooking, stews, etc.
Many cheeses change texture in the freezer. This recipe can easily be double, or tripled. The original Spaghetti Pie recipe calls for a full pound of ground beef, but I only use half a pound per pie. I find half a pound to be more than enough. Stir margarine into hot noodles until melted.