Roasted garlic–orange aioli:

1 head garlic

1/2 cup plus 1 tablespoon extra virgin olive oil

2 large egg yolks, room temperature

1/2 cup grapeseed oil

Kosher salt

2 tablespoons freshly squeezed orange juice plus 1 teaspoon finely grated zest (from 1 orange)

Freshly ground black pepper

Shrimp burgers :

5 tablespoons olive oil

1/4 cup finely chopped fennel, from one small bulb (fronds reserved)

1/4 cup finely chopped shallots

1/4 cup finely chopped red bell pepper

2 tablespoons finely chopped fennel fronds

1 tablespoon finely chopped chives

1 tablespoon zest from 1 orange

1 1/2 pound shrimp, peeled and deveined, finely chopped by hand

Kosher salt and freshly ground black pepper

1 to 2 tablespoon roasted garlic-orange aioli

Toasted hamburger buns for serving (brioche is nice)