"Cooking on the Sabbath should be avoided; but it is not therefore necessary to eat cold food. In cold weather the food prepared the day before should be heated. And let the meals, however simple, be palatable and attractive. Especially in families where there are children, it is well, on the Sabbath, to provide something that will be regarded as a treat, something the family do not have every day. MH 307.4"
"And he said unto them, This is that which the Lord hath said, To morrow is the rest of the holy sabbath unto the Lord: bake that which ye will bake to day, and seethe that ye will seethe; and that which remaineth over lay up for you to be kept until the morning."
The EGW passage directly addresses the issue of Sabbath cooking and eating, echoing the principle established in Exodus 16:23 regarding preparing food in advance for the Sabbath. It's a clear application of the biblical instruction.