Keep in mind that Counsels on Diet and Foods was compiled with little attention to which counsel was directed to individuals and which was for people in general. And the selections reflect the biases of the compiler(s). For example, the egg in grape juice advice was for a specific individual suffering from pernicious anemia; it’s not at all recommended for the general public, especially now that we have more understanding of the causes and treatment of the disease.
My three principles, based on her writings, include 1) a wide variety of foods; 2) simply prepared (i.e., not too much fat or sugar); and 3) in moderation (that’s a hard one!), which will depend on the needs of the individual (heavy manual labor vs sedentary work). There is an additional corollary: If something disagrees with your system, avoid it. That covers those who don’t tolerate fruits and vegetables together, which would be defined by the common usage, not the botanical discussion the subject frequently devolves into.
Another important fact about Ellen White’s household: people were not prohibited from visiting the kitchen and eating something for a third meal, but a third meal was not served. She recognized variations in physical needs and readiness for changing to a two meal a day plan. She was more realistic than many of her quotes, taken out of context, would suggest.
I’m a former SDA dietitian, so have been steeped in much of this information. I wish more ordinary members heard and understood SDA dietitians and others when this is discussed.