"The Reagans typically eat breakfast together at 7:45 A.M., and their menu is as consistent as it is sensible. The nutrition-conscous First lady is aware of the importance of including adequate amounts of fiber-rich foods in the diet, and of minimizing intake of fat and cholesterol.
Therefore, the Reagans start the day with bran cereal, skim milk, fresh fruit, and decaffeinated coffee. Once a week, eggs are served--scrambled, poached, or soft-boiled for our minutes--a single egg for each of them. The President usually supplements his morning repast with whole wheat toast or a home-made muffin...Monkey Bread is a heavy, sweet loaf that serves as a Reagain family tradition...Reserved for special occasions and holidays, Monkey Bread is a definate deviation from the lighter fare preferred by the First Lady...When bread is included on the Reagan family dinner menus, it is most often in the form of wedges of pita... Ronald Reagan...retained an appetite for simple, home-style meals.
Even in the White House, Ronald Reagan prefers the plain foods of his early days...These include such homey dishes as Macaroni and Cheese, Meat Loaf, and Hamburger Soup...The President usually has lunch in the Oval Office, and he prefers a light meal such as soup, bread, and a fruit dessert. He likes minestrone with a wedge of fresh Italian bread, lentil soup with sliced frankfurters, navy bean or black beans soup, and Scotch broth made with barley.
His favorite soup...is a home-style hanburger soup made with beef broth, lean ground beef, fresh tomatoes, and hominy. Served with a slice of toasted French bread and perhaps a medley of fresh fruit for dessert...Sunday night fare typically consists of a simple main dish, fresh vegetables, salad and fruit.
The Reagans are fond of hash made with chicken, but the President's favorite is an old-fashioned roast beef hash. Sometimes they enjoy a hearty dinner of roast beef with Yorkshire Pudding. They are also fans of a California favorite, steak with chili. Mrs. Reagan likes her meat cooked medium-well, while the President prefers his well-done...Dinner menus at Rancho del Ciero are similar to the hearty meals served at Camp David...
Although the Reagans prefer chicken, veal, and fish to beef, several of their best-liked dishes do feature lean beef. Beef and Kidney Pie is one... ...Osso Bucco...is a favorite of the Reagans and is served for both family dinners and special meals. Other veal dishes favored by the Reagans include veal scallopine in Marsala, Veal Piccata, and Veal Parmigiana...
President Reagan is especially fond of broiled swordfish napped with lemon butter. P> Mrs. Reagan is fond of number of fish dishes, including salmon mousse, grilled halibut steak, broiled trout with kiwi fruit, and swordfish Veronique...the Reagans ...enjoy some sort of light dessert after most every meal. Fruit desserts are especially popular, including a wide array of apple dishes...
The President is fond of honey-baked apples, and Mrs. Reagan's favorite is an old-fashioned Apple Brown Betty..."
The jelly bean factor? Why this president munched jelly beans, courtesy of the Ronald Reagan Museum and Library---when he quit smoking.
SOURCE http://www.foodtimeline.org/presidents.html
I don't know if more recent article refute that or not. I do know that my mil had Alzheimer's and they drank decaf as well.
As an aside, I watched a show on the History channel, I think, over the weekend about the Presidents and the chef for the Reagan's said that Nancy didn't want him giving President Reagan chocolate. But, he knew the President craved it and would give chocolate mousse when Nancy was out of town.