Cod With Asparagus Spoon Salad

Name: Cod With Asparagus Spoon Salad
Ingredients: 4 Tbsp. extra-virgin olive oil, divided; 2 oil-packed anchovy fillets; Pinch of crushed red pepper flakes (optional); 1 lb. asparagus, woody ends trimmed, sliced ¼-thick into rounds; Kosher salt, freshly ground pepper; Zest of ½ lemon; 1 garlic clove, finely grated; ½ cup finely chopped mixed tender herbs (such as chives, mint, dill, parsley, and/or cilantro); ⅓ cup coarsely chopped pitted Castelvetrano or other green olives; 2 Tbsp. fresh lemon juice; ½ cup all-purpose flour; 4 5–6-oz. cod, hake, or haddock fillets, patted dry; 2 Tbsp. ghee or vegetable oil; Lemon wedges (for serving; optional)