Hope it's not too late, but here are the main things she advises buying.
Mineral water, herbal teas.
Almond, Sesame or Rice Milk
All kinds of fruit and veg
Millet, Brown rice, Quinoa, Buckwheat, Oats, non-wheat pasta
Kidney beans, chickpeas, haricot beans, butter beans, hummus, lentils
Almonds, brazil nuts, walnuts, cashews, pine nuts, peanuts, sesame seeds, sunflower seeds
Wheat-free yeast-fress bread, rye crackers, oatcakes, ricecakes
Sunflower and olive oil
Selection of dried herbs and spices.
Good Luck - I know she says not to weigh yourself, but I had a sneaky step on the scales this morning and I've lost 5lb in a week