Grilled Mock Fillet Steak

INGREDIENTS:

1 lb Marlin; swordfish or tuna
-steaks, 3/4-1" thick
12 Uncooked lg. shrimp; peeled,
-deveined, thawed, if frozen
1 md Fennel bulbs; cut crosswise
-into 6 slices
10 Leaves romaine; coarsely
-shredded
14 oz Can artichoke hearts;
-drained -OR-
5 Stalks canned hearts of
-palm; drained, cut into 1
-inch pieces (up to 6)
1/2 sm Red onion; thinly sliced
12 Cherry tomatoes
12 Kalamata or ripe olives