Green Bean Casserole Salad

Name: Green Bean Casserole Salad
Ingredients: 3 tablespoons olive oil, divided; 2 shallots, thinly sliced (1/2 cup); 4 ounces sourdough bread, cubed (3 cups); 8 ounces cremini mushrooms, trimmed and sliced; 1 pound fresh green beans, trimmed and halved; ¼ cup water; 1 tablespoon Dijon mustard; 1 tablespoon white-wine vinegar; 3 cloves garlic, minced; 1 tablespoon fresh thyme or 1 teaspoon dried; ½ teaspoon salt; Ground pepper to taste; 1 bunch chard, leaves coarsely chopped (about 4 cups)