Spring Crab Salad Roll

Name: Spring Crab Salad Roll
Ingredients: 1/2 pound fresh jumbo lump crab meat; 1 small red pepper, finely diced; 1 small yellow pepper, finely diced; 1 tablespoon good-quality Dijon mustard; 1 small bunch chives; 1 small bunch chervil (reserve a small amount, for garnish); 1 teaspoon horseradish; 1 tablespoon mayonnaise; 1 tablespoon sour cream; 1 teaspoon dry mustard (recommended: Coleman's); 1 teaspoon Worcestershire sauce; 1/2 lemon, juiced; Salt and freshly ground black pepper; 1 green plantain; Oil; 1 hot house cucumber (European seedless); Reserved chervil