*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
**Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-)Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
Adjust oven rack to center position and preheat oven to 350 degrees F (175 degrees C).
Heat 1 tablespoon of butter in a large skillet over medium-high heat. Add onions and cook until caramelized and golden brown, about 10 minutes. Add broth and bring to a simmer.
Butter both sides of the bread and bake until lightly crisp and heated through, about 10 minutes.
Place bread on 4 plates and arrange beef slices on bread. Pour a portion of the broth and onions into 4 small cups or bowls. Serve, spooning the onions over the beef and dipping the sandwiches in the broth.