Run cold water over the clams. Make sure all clams are closed tightly and scrub shells clean.
Place saffron threads in a small bowl. Pour two tablespoons of water over and steep for 10 minutes.
Remove the peel from the orange with a sharp vegetable peeler or knife. Use a sharp knife to trim away the white pith from the peel. Cut the orange in half and reserve.
Slice the Fresno chili into thin rings.
Place a heavy-bottomed pan over medium heat. Add the olive oil, garlic, bay leaf, chili and orange peel. Cook until the garlic is golden brown and fragrant.
Add the clean clams, the juice from half of the orange, the saffron and the wine.
Turn the heat under the pot to high and cover with a tight lid. Cook for 4 -5 minutes until the clams have opened.
When the clams have opened, remove the bay leaf and orange zest. Remove the opened clams to a bowl and discard any that have not opened.
To the juices in the pot, add the butter, the juice from half of the lemon and the chopped parsley. Cook over medium heat for about 5 minutes. Add the blanched asparagus.