Serves 4

1/2 cup buckwheat or all-purpose flour
2/3 cups milk
2 large eggs
3 tablespoons melted salted butter, divided
Kosher salt and freshly ground black pepper
8 ounces brie, thinly sliced
2 bunches Swiss chard, leaves sliced into 2-inch pieces
2 teaspoons honey
2 teaspoons red-wine vinegar