Phase 1: Potatoes
Preheat oven to 400°F (200°C), rack in center.
Toss halved potatoes with 2 tbsp olive oil, minced garlic, Italian herbs, ¾ tsp salt, and ¼ tsp pepper. Let rest 5 minutes.
Arrange cut-side down on a baking sheet without overcrowding. Roast 25–30 mins, flipping once at 15 mins, until golden and tender.
Phase 2: Salmon
Mix 2 tbsp olive oil, paprika, cumin, ½ tsp garlic powder, ½ tsp salt, and ¼ tsp pepper to make spice paste.
Pat salmon dry, rub spice paste evenly on both sides. Rest 10 mins at room temperature.
Phase 3: Finish & Assemble
Heat skillet (non-stick or cast iron) over medium-high heat. Sear salmon presentation-side down (skin side up if skin-on) for 4–5 mins without moving.
Flip and cook 3–4 mins more for medium doneness (internal temp 145°F). Remove and tent with foil.
Add 1 tbsp olive oil to skillet, sauté asparagus with ½ tsp garlic powder, salt, and pepper for 4–5 mins until crisp-tender.
Remove from heat, sprinkle cheddar evenly, cover for 2 mins until melted.
Plate potatoes, top with cheesy asparagus, then salmon. Serve with lemon wedges.