Tuna Tramezzini al Tonno e Uovo - The Local Palate

Ingredients

• 4 farm eggs room temperature
• 1 pound Italian canned tuna in oil, drained
• 8 soft white bread slices crusts removed
• softened butter, for spreading
• 2 cups watercress
• loosely packed
• Tomato sliced paper thin
• Dill, picked
• 2 egg yolks
• 1 tablespoon lemon juice
• 2 tablespoons capers
• 4 anchovy, filet
• 1 small garlic clove, finely chopped
• 1 teaspoon Dijon mustard
• 1 cup olive oil