White Bean Cassoulet

Name: White Bean Cassoulet
Ingredients: 1/2 cup olive oil; 10 cloves garlic, diced; 1 medium white onion, diced; 2 carrots, diced; 4 stalks celery, diced; 1 herb bouquet tied with kitchen string: 4 stems fresh rosemary, 8 stems fresh oregano, 10 stems fresh thyme; 1 dried bay leaf; 2 cans cannellini beans, or 3 cups prepared white beans; 2 quarts chicken stock; 4 links spicy cooked chicken Italian sausage, sliced, recipe follows; 1/2 cup Spinach Pesto, recipe follows; Garlic-Parmesan Crostini, recipe follows; 1/4 cup olive oil; 1/2 teaspoon salt; 6 spicy chicken Italian sausage; 1/2 pound spinach leaves; 5 cloves garlic, smashed and minced; 1/2 cup toasted pine nuts; 1 1/2 cups extra-virgin olive oil; 3/4 cup grated Parmesan; 1 teaspoon kosher salt; 1/4 teaspoon fresh white pepper; 1 French style baguette, cut into 24 (1/2-inch thick) slices; 10 cloves garlic, minced; 1/2 cup shaved Parmesan