3 leek soup toasted croutons Recipes

sweet butter, chopped yellow onions, leeks, white parts only,well cleaned and thinly sliced, chopped shallot, garlic, peeled and minced, chicken stock or 4 cups vegetable stock, dried thyme, bay leaf, salt & freshly ground black pepper, to taste, heavy cream, scallions, trimmed,cleaned,and diagonally cut into 1/2 ,pieces, toasted french bread crouton (garnish ), snipped fresh chives (garnish )

extra virgin olive oil, yellow onions, thinly sliced, leeks, white and light-green parts only , thinly sliced crosswise, garlic cloves, smashed and peeled, dry white wine, low sodium chicken broth, bay leaves, sliced prosciutto, finely diced, unsalted butter, baguette (1/2-inch-thick slices), shredded gruyere cheese (6 to 8 oz), salt & freshly ground black pepper, chopped fresh chives or 1/3 cup flat leaf parsley