Grilled Merguez Sandwiches With Caramelized Onions, Manchego, and Harissa Mayonnaise Recipe

Grilled merguez on a toasted baguette with sweet caramelized onion, sharp Manchego cheese, fresh cilantro, and spicy harissa mayo makes for one insanely awesome sandwich. 1/3 cup mayonnaise 1 tablespoon harissa 8 links merguez 1 French baguette 1/3 cup extra-virgin olive oil 1/2 cup caramelized onions 1/3 …