Blanch the asparagus (place in in a large pot of boiling water for approximately 1 to 2 minutes, until the asparagus turns bright green. Then drain and run very cold water over the asparagus to stop it from cooking). Set aside.
Melt the butter in a large saucepan.
Add the lime juice, salt, and lime zest. Stir until combined.
Add the asparagus and stir until well-coated. Cook until hot, about 3 to 4 minutes.