Slow Cooker Vegetable Stew

Name: Slow Cooker Vegetable Stew
Prep time: 20 min
Cook time: 5 h
Total time: 5 h 20 min
Cuisine: American
Ingredients: 3 cloves garlic (chopped); 1 medium onion (chopped ); 1 (8-ounce) package sliced mushrooms; 2 ribs celery (chopped); 2 large carrots (cut into thick slices); 1 small butternut squash (peeled, deseeded, and cut into 1 1/2-inch chunks); 2 medium leeks , white parts only (sliced); 1/2 pound small white potatoes, left whole; 1 (15-ounce) can lower-sodium white beans; 3/4 cup vegetable broth; 1 (15-ounce) can fire-roasted crushed tomatoes (such as Muir Glen brand); 1 bay leaf; salt; pepper; bread