silky cauliflower soup

INGREDIENTS

• 1 head cauliflower
• 2 tablespoons extra-virgin olive oil
• 1 small onion, chopped
• 2 cloves garlic, minced
• 1 quart low-sodium chicken stock
• 1/2 cup finely grated Parmesan
• Salt and freshly ground black pepper
• 2 tablespoons mayonnaise – or – 1 egg
• 1 tablespoon fresh lemon juice
• 1/2 teaspoon Dijon mustard
• 1 small garlic clove, minced
• 1/2 teaspoon Worcestershire sauce
• 1 oil-packed anchovy fillet, finely chopped (optional)
• 1/4 cup extra-virgin olive oil
• 10 to 12 ounces good-quality solid tuna packed in olive oil, well drained*
• 2 scallions washed, trimmed and chopped fine
• 6 pepperoncini peppers, destemmed and julienned
• 3 tablespoons chopped fresh dill
• 1/4 cup roasted or smoked almonds, chopped roughly, or a small handful toasted pine nuts
• 1/4 cup good-quality olive oil (or the oil the tuna was packed in)
• 1 tablespoon smooth Dijon mustard
• 1 tablespoon whole-grain mustard
• 1 teaspoon balsamic vinegar
• 1 teaspoon fresh lemon juice or more to taste
• 1/4 to 1/2 teaspoon freshly ground black pepper.