https://www.bonappetit.com/recipe/simple-is-best-dressing

Step 1
Preheat oven to 250°. Butter a 13x9x2-inch baking dish and set aside. Scatter bread in a single layer on a rimmed baking sheet. Bake, stirring occasionally, until dried out, about 1 hour. Let cool; transfer to a very large bowl.

Step 2
Meanwhile, melt butter in a large skillet over medium-high heat; add onions and celery. Stir often until just beginning to brown, about 10 minutes. Add to bowl with bread; stir in herbs, salt, and pepper. Drizzle in half of the broth and toss gently. Let cool.

Step 3
Preheat oven to 350°. Whisk half of the broth and all the eggs in a small bowl. Add to bread mixture; fold gently until thoroughly combined. Transfer to prepared dish, cover with foil, and bake until an instant-read thermometer inserted into the center of dressing registers 160°, about 40 minutes.

Step 4
Continue to bake dressing, uncovered, until set and top is browned and crisp, 40–45 minutes longer.