Rinse and skin, above, if necessary:
Combine in a shallow bowl:
Dredge the frog legs in the seasoned flour. Heat in a large skillet over medium heat:
Add the frog legs and cook until browned, about 4 minutes per side. Transfer to a plate. Add to the skillet and cook until softened:
Return the frog legs to the skillet and pour in:
Bring to a boil, then reduce the heat, cover tightly and simmer for 10 minutes.
Meanwhile, melt in a small skillet:
Add and toast in the butter:
Transfer the frog legs to a serving dish. Bring the stock and onion mixture in the skillet to a boil and stir in:
Cook briefly until thickened and pour the sauce over the frog legs. Sprinkle with the bread crumbs and: