Substances:
- 1 baguette
- ¼ cup mayonnaise
- 1 tablespoon Dijon mustard
- 1 tablespoon lemon juice
- ½ teaspoon salt
- 1 shrimp fennel bulb, coronary heart and outer leaves eliminated, thinly sliced
- ½ lb roast beef
- 1 medium yellow onion, thinly sliced
- 2 tbsp unsalted butter
- 1 tbsp sugar
- 1/4 teaspoon salt
- 2 tablespoons white wine
- 1/3 cup apple cider
- 1 tbsp cider vinegar