In a large pot, cook chopped celery, diced onion, rosemary, and thyme in 1/4 cup of butter over medium heat until the onion is translucent and fragrant.
1 large yellow onion, diced, 1 stalk celery, chopped, 2 sprigs fresh thyme, removed from stem and chopped, 2 sprigs fresh rosemary, removed from stem and chopped, ¾ cup unsalted butter
Use a serrated knife to cut your bagels into cubes, about 1 cubic inch in size, and set aside.
6 day-old Everything Bagels
Preheat your oven to 350°F.
Turn heat down to low and add remaining butter, vegetable broth, and salt and pepper. Heat until butter is completely melted.
1 ½ cups vegetable broth, ¼ teaspoon salt, ¼ teaspoon black pepper
Add bagel cubes and stir to coat.
Transfer stuffing to a 10.5″ x 7.5″ oven-safe casserole dish. Sprinkle everything bagel seasoning on top.
1 tablespoon everything bagel seasoning
Bake for 35-45 minutes, until the top starts to turn golden brown.