I think that it will be important for someone to be sitting with her and eating their meals also so that there will be true accountability.
We did the transition to independent eating a little more gradually.
First our d. portioned her own meals and drinks (we ate together so we could make sure she was taking enough)
Then she picked snacks on her own and ate those (again I was paying attention that she did that)
Then she was able to try eating some meals with friends out of the house (probably not an option for your d. right now but important to be able to do that as she moves along since being able to eat with friends at college is part of a good social life there )
We also worked on eating in restaurants and being able to order from a menu. (again probably not an option right now but a skill she will need for the future)
Then she was tasked with taking her own lunches while at the local college three days a week. Her weight was being monitored so we could see if she lost anything, so that when she did we tightened up the situation with more support.
Throughout this time we kept a binder full of the recipes which she had been able to eat and cook, many of which used simple ingredients and were fairly easy and quick to cook, and when she left for college I sent her off with her "cookbook".
We also had her live in an apartment with a kitchen, so that she could prepare her own food, after some disastrous issues with the school cafeteria her first year. So she had a very rudimentary meal plan which meant she could eat a few meals a week in the caf with friends for lunch, and then she took breakfast and made dinner at home.
We did let her try at one point entirely on her own before she was ready; she took a trip with some friends for a few weeks the summer before that fall semester. It was kind of a test to see if she could be ready to go back to college for the fall semester and feed herself. She lost weight and came to the conclusion herself that she was not yet ready. And that is why she took that semester at home.
So by all means allow your daughter to try but IMO it is important to monitor her weight at the same time. If she loses, then you know that more support is needed from you. And be careful to make sure that this is not a ploy by the ED in order to restrict her diet, but an honest attempt to try and get ready to be able to go back to college and be successful. A person who doesn't have an eating disorder eats with others and doesn't need to be "in control" of their food.
I think it is important to try and point her in a direction where she can believe that she will be successful and take the steps as a support person so that she can do so. Also, it is not a straight line to recovery. She may lose some weight and then you will need to discuss how to rectify that and keep her on track. You may need to step in again if she does. My d. was also very motivated to be able to be successful at returning to college, and it helped push her ahead to recovery. But still there were times when she backtracked weight wise. So see how you can harness that motivation to keep your daughter focused on moving ahead with her recovery.
We often cook together and here is a blog I especially love with recipes:
It is not particularly high calorie, so good for someone who is weight restored and wants to expand the variety of foods that they will eat, however it uses a reasonable amount of fats, oils, etc. Maybe cooking together and letting her choose some recipes might help her to be able to be more independent. As long as she eats large enough portions, and the food has enough calories and nutrients, and she is not restricting.
The New York times cooking section (subscription required) also has a great collection of menus.
We got into the habit of planning meals for the week together, and then getting the ingredients for them and cooking some of them together.
Another thing I did and this again, may not be possible until later, was that I went shopping with her every few weeks, so we planned menus and bought what she needed when she returned to school. At first I took the lead, however as time went on she knew what she needed and was able to fill the cart properly. Try to be creative with cooking and to get her interested in making good food. We used fresh herbs whenever possible (I have a little kitchen herb garden in the yard)
I sent her to college with an eating disorder, and she came home after graduation having learned how to shop, cook, eat with others, take snacks and make sure she ate enough, and maintain a reasonable weight. These things as meaningful as the classes she took since they mean she will be able to have a full and independent life.
This was a girl who couldn't order a meal in a restaurant, feed herself, eat in a cafeteria, whose hands shook when she even looked at an apple pie, and who wrote a suicide note and wanted to jump off a building and spent 3 months in the hospital. Hoping that some of this might be helpful for your family and daughter.