Herbed Waffle with Caramelized Fennel Club

Name: Herbed Waffle with Caramelized Fennel Club
Ingredients: 1 cup store-bought pesto; 1 cup mayonnaise; 1/2 cup grated Parmesan; 1/4 cup olive oil; 2 bulbs fennel, ends trimmed, split and cored, thinly sliced; 1 tablespoon chopped garlic; 1 large white onion, thinly sliced; 1 large red onion, thinly sliced; Salt and freshly ground black pepper; 2 cups spinach; 1/2 cup roasted pepper, diced; 1/4 cup green olives, sliced; Juice of 1 lemon; 2 cups all-purpose flour; 1 teaspoon baking powder; 1/2 teaspoon salt; 1 teaspoon baking soda; 2 eggs, lightly beaten; 2 cups buttermilk; 8 tablespoons butter, melted and cooled; 2 tablespoons chopped fresh chives; 2 tablespoons chopped fresh cilantro; 2 tablespoons chopped fresh oregano; Nonstick spray