While there is something indisputably weird about strolling into a Flats bar in the first light of day, it's worth the fleeting disorientation to discover breakfast at the River's Edge. At this hour, the well-worn East Bank watering hole is dim and friendly, with early birds perched around the bar downing huge portions of chow. Favorites include "stuffed" French toast, filled with a massive slab of cream cheese and strawberry preserves, and the delicious Mish Mash: a half-dozen eggs scrambled with bacon, potatoes, and onions, and piled up so high that the accompanying rye toast threatens to slide right off the plate. Some people contend that the working stiff's breakfast at the Edge is this city's best-kept secret. For price, quality, and friendliness, we say it's the best, period.