Blood Orange Vermouth Cocktail

After a few days in Spain, I noticed that people around me at cafes were all ordering a red drink I didn’t recognize. I asked a server what it was and he answered, “vermut.” Just vermouth, I thought? Straight? I’m used to seeing it mixed into cocktails, but in Spain I quickly learned to love it on the rocks as an apéritif. Some places also throw in soda and bitters, and the garnish is usually orange, but it varies. It’s a drink that is typically enjoyed on Sunday afternoons, perhaps the way