01 - Combine olive oil, lemon zest, lemon juice, minced garlic, smoked paprika, salt, black pepper, and dill in a small bowl; whisk until evenly blended.
02 - Pat salmon fillets dry with paper towels. Brush both sides with marinade, reserving 1 tablespoon for asparagus.
03 - Toss trimmed asparagus spears with the reserved marinade until well coated.
04 - Preheat the air fryer to 400°F (200°C) for 3 minutes.
05 - Place salmon fillets skin-side down in the air fryer basket, leaving space between them. Arrange asparagus spears around the salmon.
06 - Air fry for 10 to 12 minutes until the salmon reaches an internal temperature of 125–130°F and asparagus is tender with lightly crisp edges.
07 - Plate immediately and garnish with lemon wedges and optional fresh herbs.