Shrimp Rolls with Celeriac and Horseradish Sauce

Ingredients

• 180 ml (3/4 cup) mayonnaise
• 125 ml (1/2 cup) ketchup
• 1 small clove of garlic, finely chopped
• 10 to 15 ml (2 to 3 tsp) horseradish
• 45 ml (3 tbsp) fresh basil, chopped
• 5 ml (1 tsp) maple syrup
• Salt and pepper, to taste
• 450 g (1 lb) fresh or thawed Nordic shrimp
• 250 ml (1 cup) celeriac, peeled and cut into thin julienne
• 125 ml (1/2 cup) fennel (or celery), diced
• 45 ml (3 tbsp) green onions, finely chopped
• 30 ml (2 tbsp) fresh basil, chopped
• 4 to 6 slices of Campagnolo bread, white loaf, or 100% whole wheat loaf
• 500 ml (2 cups) iceberg lettuce, finely chopped