The Sunshine Store is a treasure. It is camoflaged as a gas station, at the intersection of Routes 97 and 650, near the Montgomery-Howard County line.
I do love the burgers, but I mostly pass by there in the early morning. They have decent pancakes, chipped beef or sausage gravy (read the specials list, which is posted on the wall) My go-to carry out is a bacon, egg and cheese sandwich on whole wheat toast, with hot sauce. Easily four strips of bacon--when I was working for the steeplechase trainer, we discovered that a Sunshine breakfast sandwich at 7 was enough to get by for the day.
When ordering, please be polite--the locals disapprove of bad manners. Also, that article claims they are open until 5 or 6--I have never seen the grill open past 3 (but they fire up at 5 on weekdays and 6 on weekends).
I'll be there Saturday around 8 (Maryland Hunt Cup that day).