Grilled Swordfish with Green Caper Sauce

Name: Grilled Swordfish with Green Caper Sauce
Ingredients: 1/4 cup EVOO; 3 garlic cloves, minced; 3 cups packed spinach leaves, trimmed of stems and washed; 1 cup plat-leaf parsley leaves; 4 scallions washed, and thinly sliced; 1 tablespoon chopped fresh tarragon; 1 1/2 tablespoons capers, rinsed; 6 anchovy filets, rinsed and finely chopped (or 1 tablespoon anchovy paste); 2 teaspoons freshly squeezed lemon juice; Red or white skinned baby potatoes; Kosher salt and freshly ground black pepper to taste; 1 swordfish steak per person, between 3/4 and 1 thick; Olive oil