1 lb. Papppardelle’s Spanish Saffron Trenette
1 cup whole-milk yogurt
Salt and pepper, to taste
½ tsp. cayenne pepper
1 shallot, peeled & minced
1 bunch asparagus
½ tsp. saffron threads
Juice of ½ lemon
4-6 halibut filets, skin removed
4 Tbsp. butter, divided
Extra-virgin olive oil