Prep Lime: Zest the lime to get about 2 teaspoons zest, then juice it to get about 2 tablespoons juice. Keep the zest and juice separate for seasoning and sauce.
Season Salmon: Place the salmon fillets on a plate and sprinkle the tops with 1 teaspoon sriracha seasoning. Sprinkle the lime zest evenly over the salmon.
Arrange Pan: Line a baking sheet with aluminum foil. Place the salmon on the pan and arrange the asparagus beside it in a single layer.
Coat for Broiling: Lightly spray the salmon and asparagus with cooking spray. This helps browning and keeps everything from drying out.
Broil: Set an oven rack near the top and turn the broiler to high. Broil for about 6 to 8 minutes, until the salmon flakes easily with a fork and the asparagus is tender-crisp.
Start the Sauce: Add the lime juice, minced garlic, honey, and ½ teaspoon sriracha seasoning to a food processor. Pulse briefly to combine.
Emulsify with Butter: With the processor running, slowly pour in the melted salted butter and blend until smooth and creamy, about 15 to 30 seconds.
Serve: Spoon the warmed cauliflower rice medley onto plates, add the asparagus, and top with the broiled salmon. Spoon the lime-butter sauce over the salmon and serve right away.