If you don't want to take oral supplements high cocoa solids 70% or higher chocolate is very rich in magnesium, or try a magnesium oil spray. You could try a warm bath before bedtime and a bit of gentle massage and maybe switch from one meal a day as it would be hard to get enough variety in your diet to cover your needs eating like that. There is quite a bit of info out there most of it based on the idea that RLS is a problem caused by deficiency of various nutrients. Iron is also a suspect so increasing the iron in your diet will be worth trying too. It is absorbed better with vit c so some fruit after a red meat dinner isn't a bad option