20 gingersnap cookies
3/4 cup walnut pieces
1 tablespoon light-brown sugar
1/2 teaspoon coarse salt
3 tablespoons unsalted butter, melted and cooled
1 1/2 teaspoons unflavored powdered gelatin (from 1 packet)
1/2 cup heavy cream
3 tablespoons mild honey
Coarse salt
1 3/4 cups Greek yogurt (2 percent)
3/4 teaspoon pure vanilla extract
1 1/2 cups dried plums
1/4 cup packed light-brown sugar
5 wide strips orange zest