Heat the butter and olive oil in a large skillet over medium heat. Add the onions, anchovies, thyme, sea salt, and freshly cracked pepper to taste. Cook, stirring occasionally, until the onions are sweet and golden brown, about 25-30 minutes.
Preheat the oven to 400 degrees.
Meanwhile, slice the baguette, brush each slice with some olive oil, and place on a baking sheet.
Bake for 5-7 minutes, or until golden brown.
Top each slice with some caramelized onions, some shaved Asiago, and an olive. Enjoy.