Wild Mushroom Bread Pudding with Sausage and Gruyère

Name: Wild Mushroom Bread Pudding with Sausage and Gruyère
Prep time: 15 min
Cook time: 1 h 10 min
Total time: 1 h 25 min
Cuisine: European, American
Ingredients: 2 tablespoons olive oil; 8 to 10 medium to large fresh sage leaves (chopped); 2 links sweet Italian sausage (skin removed, crumbled); 3 leeks (chopped, white and light green parts only); 8 oz mushroom mix (cremini, shiitake, oyster, porcini); 3 large eggs; 2 cups half-and-half; 6 cups cubed country bread (1" pieces); 3 ounces Gruyère (grated (1 loosely packed cup)); salt and freshly ground black pepper