Firstly everyone saying buy it all from the shop and don't freeze sandwiches ect
1. The point is she's saving money maybe she can't afford to just pop to the shop each day for fresh quiches things are dearer now
2. Supermarkets bulk buy they're bread products including sandwiches and freeze them till they go out on the shelves so when your eating anything 'fresh' from a shop ie bread sandwiches ect they've probably been frozen in storage.
3. This is what she chosen to do as it works for her family if it's not right for you that's OK but don't all attack her for her way of doing things if the kids don't mind and it makes thi gs easier and cheaper for her then great