Bring the broth to a simmer in a large skillet

As soon as the broth begins to simmer, place the asparagus in the pan

Lay the salmon fillets on top of the asparagus and sprinkle lightly with salt and pepper

Cover and let simmer for about 8 minutes, until liquid has almost completely evaporated

While the dish is simmering, stir together the remaining ingredients

Remove skillet from heat, spoon the blackberry mixture onto the salmon

Place skillet about 6 inches under the broiler for 2 minutes, or until the blackberry glaze starts to bubble

Serve immediately