He has also appeared in advertisements for Saint Agur blue cheese. "Penicillium roqueforti", responsible for the greenish blue moldy aspect of blue cheese, produces several mycotoxins. Cheese, Parmesan or blue cheese being the most common, may also be added. In some American recipes butter is replaced by blue cheese. When the cheese is freshly made, there is little to no blue cheese flavor development. Common examples include cheddar, Swiss, mozzarella, blue Cheese, and pepper jack. Another burger is the Blue Jay, a bacon cheeseburger with blue cheese and grilled onions. The main structure of the blue cheese comes from the aggregation of the casein. It is commonly described as "a cross between blue cheese, fish, and rice vinegar". The Nauvoo Blue Cheese company began to produce cheese in the 1930s. In 2007, Bizarre released his second studio album called "Blue Cheese & Coney Island". Mass-produced pizzas use, beside Mozzarella, non-Italian cheeses such as Edam, Emmental and Blue cheese. Discontinued varieties include Pimento, French Onion, Cheddar Blue Cheese, Shrimp Cocktail, and Pizza. The town also exports Farrah's Toffee, Harrogate Blue cheese and Debbie & Andrews Harrogate sausages. Blue cheeses with no protected origin name are designated simply "blue cheese".