Mini Crab Cakes with Mustard Creme Fraiche

Name: Mini Crab Cakes with Mustard Creme Fraiche
Ingredients: 1/4 cup creme fraiche; 1 tablespoon whole-grain mustard; 1 teaspoon Dijon Mustard; 1/8 teaspoon seafood seasoning, such as Old Bay; 2 slices white sandwich bread; 1 pound jumbo lump crabmeat, picked through for bits of shell; 1/4 cup mayonnaise; 1 tablespoon lemon zest, plus lemon wedges, for serving; 1 teaspoon Worcestershire sauce; 1/2 teaspoon seafood seasoning, such as Old Bay; 1/8 teaspoon cayennepepper; 2 scallions, finely chopped; Kosher salt and freshly ground black pepper; 1 large egg, beaten; 3 tablespoons unsalted butter; 1 tablespoon chopped chives, for garnish