Shrimp Burgers with Roasted Garlic-Orange Aioli

INGREDIENTS

• 2 large egg yolks, room temperature
• 1 tablespoon finely chopped chives
• 1 1/2 pound shrimp, peeled and deveined, finely chopped by hand
• 2 tablespoons finely chopped fennel fronds
• 1/2 cup grapeseed oil
• 1 tablespoon zest from 1 orange
• Kosher salt
• 1 to 2 tablespoon roasted garlic-orange aioli
• 1/2 cup plus 1 tablespoon extra virgin olive oil
• 2 tablespoons freshly squeezed orange juice plus 1 teaspoon finely grated zest (from 1 orange)
• Freshly ground black pepper
• 1/4 cup finely chopped shallots
• Toasted hamburger buns for serving (brioche is nice)
• 1 head garlic
• Kosher salt and freshly ground black pepper
• 1/4 cup finely chopped fennel, from one small bulb (fronds reserved)
• 1/4 cup finely chopped red bell pepper
• 5 tablespoons olive oil