3 garlic roasted parts croutons Recipes

yellow onions, chopped (1/4 - 1/2-inch pieces), red onions, chopped (as above), shallots, chopped, leeks , halved lengthwise and sliced (white part only), scallion, sliced (white part only , save greens for the croutons), garlic clove, minced, salt & fresh ground pepper, to taste, olive oil, red wine, fresh thyme, beef stock (rich , from beef bones roasted with tomato paste, like beef stock beef stock by txzuckerbaeckerin), french baguette , sliced into 1/2-inch thick coins, shredded gruyere cheese

country bread , ciabatta or other sturdy bread, preferably stale and sliced 1/2 inch thick, dijon mustard , as needed, extra virgin olive oil , as needed, kosher salt , more as needed, chicken, cut into 8 serving pieces, rinsed and patted dry, head garlic, separated into cloves (but not peeled ), bay leaf , torn into pieces, thyme , sprigs