Drizzle 2 teaspoons oil in sauté pan. Add onion, season and
with salt. Cook until lightly browned and translucent; set
aside.
Spread avocado on one slice of bread. Top with arugula
cheese and grilled onions. Spread pesto on remaining
slice of bread and top sandwich. Brush top side of
sandwich with olive oil.
Place sandwich oiled side down on Panini maker. Brush
oil on remaining side of bread. Close lid and cook until
bread is golden and cheese is melted. Cut in half and
serve.
