Tuna Tartare with shoestring potatoes

Ingredients

• 1-2 Yukon potato
• Salt
• 1 tbsp White wine vinegar
• 1 tbsp Dijon mustard
• 2 Eggs, yolk only
• 3/4 cup olive oil
• Squeeze of lemon
• 4oz Bluefin tuna, cut into 1/4in chunks
• 1 tbsp Mayonnaise
• 1 tsp Shallot, small diced
• 1 tsp Parsley, chopped
• 1 tsp Cornichon, chopped
• 1 tbsp Crunchy chili garlic
• Salt + White pepper to taste
• Shoestring potatoes