Lyonnaise Sandwiches | RICARDO

Ingredients

• 12 thin slices pancetta
• 2 tbsp (30 ml) white vinegar
• 4 eggs
• 8 slices sandwich or country bread
• 2 cups (200 g) Gruyère cheese, grated
• Mayonnaise, to taste
• Salt and pepper
• 2 tbsp (30 ml) olive oil
• 2 tbsp (30 ml) red wine vinegar
• 1 tsp (5 ml) Dijon mustard
• 4 cups (100 g) endive or arugula