In a small bowl, stir together 2 tbsp oil with seasoning to make glaze.
Using a Basting Brush, brush salmon with glaze. If you have extra time, let stand 10 min or cover and refrigerate overnight.
Place salmon skin-side down on grill; reduce heat to medium. Barbecue with lid closed, until a knife tip inserted into thickest part of fish and held for 10 seconds feels warm, about 10–12 min for every 1" of thickness.
Meanwhile, trim asparagus. Place in bowl; combine with remaining 1⁄2 tbsp oil. Season with salt and pepper; toss to evenly coat. Using a BBQ grill basket, grill alongside salmon until al dente, about 2–3 min.
Per serving: Calories 270, Fat 16 g (Saturated 1.5 g, Trans 0 g), Cholesterol 60 mg, Sodium 110 mg, Carbohydrate 7 g (Fiber 3 g, Sugars 3 g), Protein 25 g.
Swap salmon for pieces of boneless, skinless chicken breast.