Peeky Toe Crab Napoleon

Name: Peeky Toe Crab Napoleon
Ingredients: 2 tablespoons crème fraîche; 2 tablespoons finely diced red pepper; 1 1/2 teaspoons Dijon mustard; 1 teaspoon finely grated lime zest; Salt and freshly ground pepper; 10 ounces lump crabmeat, picked over; 1 medium Hass avocado, diced; 2 teaspoons extra-virgin olive oil, plus more for drizzling; 1 teaspoon fresh lemon juice; 12 whole plain bagel chips; 1/2 small European cucumber, halved and thinly sliced; 12 grape tomatoes, halved; 1 teaspoon aged balsamic vinegar; 4 chervil sprigs, for garnish