I did it ages ago for digestive issues. It’s really tricky. You’re really meant to avoid processed foods, so a hamper might be difficult.
I’ve also found people doing that kind of diet end up personalising it a lot, so it might be best to run things by her, as one kind of nut might be ok but not others.
Here’s the gist:
Foods Allowed
Here is a general look at which foods are allowed on the diet. Breaking the Vicious Cycle outlines in detail all the foods that are allowed and restricted.
Fresh, unprocessed meat, poultry, fish, shellfish, and eggs
Certain legumes, including dried beans, lentils, split peas, raw cashews, and all-natural peanut butter
Cheeses such as cheddar, Colby, Swiss, and dry curd cottage cheese
Homemade yogurt fermented for at least 24 hours
Most vegetables
Fresh, frozen, or dried fruits with no added sugar
Most nuts and nut flours
Most oils, teas, coffee, mustard, cider or white vinegar, and juices with no additives
Honey
Foods Not Allowed
Sugar, molasses, maple syrup, sucrose, processed fructose
Grains, including corn, wheat, wheat germ, barley, oats, and rice
Canned vegetables with added ingredients
Some legumes
Seaweed
Starchy tubers such as potatoes, sweet potatoes, and turnips
Canned or processed meats
Canola oil and store-bought mayonnaise
All milk and milk products high in lactose, such as mild cheddar, store-bought yogurt, cream, sour cream, and ice cream
Candy and chocolate
You might be able to put something together from honey, nuts, aged cheeses, good olive oil and teas/coffees.