Preheat your oven to 425ºF (220ºC).
Cut 2 sheets of 14 by 12-inch (35 x 30 cm) heavy-duty aluminum foil and lay each on the countertop separately.
Combine broth, lemon juice, and hot sauce in a small bowl.
Season both sides of the salmon fillets with salt and pepper.
Divide the salmon onto the aluminum foil near the center.
Place trimmed asparagus on one side of the salmon following the long direction of the foil.
Adjust salmon fillets' seasoning with more salt and pepper.
Sprinkle minced garlic on top.
Drizzle the broth, lemon juice, and hot sauce mixture generously over salmon fillets and asparagus.
Divide butter pieces evenly among the foil packets, layering over salmon and asparagus.
Wrap foil packets and crimp edges together, leaving some space inside for heat to circulate.
Place salmon foil packs on a baking sheet, sealed side up.
Bake in the oven until salmon is cooked through, about 9-12 minutes.
Carefully unwrap the baked salmon foil packets.
Drizzle with more lemon juice and garnish with fresh parsley or cilantro and a slice of lemon.
Serve immediately and enjoy!