Southern Fried Catfish

Name: Southern Fried Catfish
Ingredients: 2 to 3 tablespoons olive oil; 3/4 cup mayonnaise; 2 scallions (white and tender green parts only), minced; 2 teaspoons drained sweet pickle relish; 1 liter canola, approximately, as needed for deep-frying; 3 cups cornmeal, approximately, as needed for breading stage; 2 tablespoons Irvine Spices Cajun Blackfish spice (you may need more if you use more cornmeal for breading); Salt and freshly ground black pepper; 4 pounds catfish fillets; Lemon wedges, for service