Sheet Pan Bronzed Salmon ‘n Asparagus

Name: Sheet Pan Bronzed Salmon 'n Asparagus
Ingredients: 1 1/2 tablespoons coconut palm sugar (or brown sugar); 1 1/2 teaspoons chili powder; 1 1/2 teaspoons cumin; 1/4 teaspoon smoked paprika; 1/2 teaspoon kosher salt; Cayenne as desired (optional); Parchment paper; 1 1/2 pounds salmon fillet (cut into 4 equal pieces); 1 pound asparagus spears (trimmed (look for thin-medium width)); Kosher salt and pepper as desired; Olive oil; 2 lemons (sliced)