4 (5 oz) swordfish steaks, each about 1/2-inch-thick .
salt & freshly ground black pepper .
1 lemon, juice of .
2 tbsps light olive oil
Directions
Step #1 Place the panko in a pie dish.
Step #2 In another pie dish, beat the eggs to mix.
Step #3 Line a large cutting board with plastic wrap.
Step #4 Place 2 swordfish steaks on plastic wrap, about 2 inches apart.
Step #5 Place another sheet of plastic wrap over the steaks.
Step #6 Using the flat side of a meat mallet or a heavy rolling pin, carefully flatten the swordfish steaks to 1/4-inch thick.
Step #7 Remove top plastic wrap & sprinkle the swordfish with salt & pepper on both sides.
Step #8 Set aside the swordfish steaks & flatten & season remaining 2 steaks, using the plastic wrap to help again.
Step #9 Dip each steak into the egg, then the panko, coating completely & patting to adhere.
Step #10 Working in batches, melt 2 tbsps of butter with 2 tbsp of light olive oil in a heavy large frying pan over medium-high heat.
Step #11 Place 2 coated swordfish steaks in pan & cook this until brown & crisp & just cooked through in the middle, about 1 1/2 mins per side.
Step #12 Transfer to a cooling rack set on a baking sheet & lightly tent with foil wrap to keep warm (do not seal with foil wrap or the breading will become soggy).
Step #13 Repeat with the remaining butter, olive oil, & 2 swordfish steaks.
Step #14 Whisk the lemon juice & extra-virgin olive oil In a large-ish bowl to mix.
Step #15 Add the arugula & watercress, & toss lightly to coat.
Step #16 Spice up the salad, to taste, with salt & pepper.