Mixed Crostini: Crostini Misti

Name: Mixed Crostini: Crostini Misti
Ingredients: 1 1/2 cups dried cannellini beans, soaked overnight in water to cover; 2 tablespoons extra-virgin olive oil, plus 4 tablespoons, plus 2 tablespoons, plus 2 tablespoons, plus 4 tablespoons; 1 small red onion, finely diced; 2 red bell peppers, cored and seeded, and chopped into 1/2-inch dice; 1 teaspoon fresh thyme leaves; 1 teaspoon chopped fresh oregano leaves; Salt and pepper; 1/2 head cavolo nero or kale, stalks removed and roughly chopped; 1 teaspoon hot red pepper flakes; 1/4 pound prosciutto, cut into 1/4-inch dice; 1/2 pound porcinis or portobellos, stems removed; 4 sage leaves, cut into chiffonade; 2 leeks, cleaned and cut into 1/4-inch thick rings; 1/2 bunch mint, leaves only; 2 cloves garlic, crushed; 2 tablespoons fresh rosemary leaves, finely chopped; 2 tablespoons balsamic vinegar; 1 loaf Italian stirato, or baguette, cut into 1/2-inch slices, on bias