1.
Pistou
In a food processor or blender, chop arugula with 1/2 Tbsp lemon juice, mint, fennel tops, garlic, pine nuts, and capers. With machine running, slowly pour in about 3/4 cup olive oil until mixture becomes a smooth paste. Season with salt and pepper. Scrape into a bowl.
2.
Skewers
Place swordfish in a shallow dish. Sprinkle lightly with salt and pepper, remaining lemon juice and crushed pepper. Toss with 1/4 cup Pistou, until evenly coated. Marinate in refrigerator 1-2 hours.
3.
Heat oiled grill to medium-hot. Brush fennel wedges with oil. Thread fish onto skewers alternating with olives, fennel and lemon slices. Grill over direct, medium-high heat about 6-8 minutes, turning once or twice, until fish is char-marked and no longer pink in the middle.
4.
Remove skewers from grill and gloss with a little extra olive oil. Serve with baguette toasts spread with Pistou.