Preheat oven to 250°F.
Spread butter over a 13x9x2? baking dish and set aside to prepare dish.
If using fresh, non-stale bread: spread bread in a single layer on a rimmed baking sheet. (If using stale bread, skip to step 6.)
Bake, stirring occasionally, until dried out, about 1 hour.
Let cool.
Place dried bread into large bowl.
Melt 3/4 cup butter in a large skillet over medium-high heat; add onions and celery to soften and make fragrant.
Stir often until just slightly browned, about 8-10 minutes.
Add butter, onions, pine nuts, and celery to bowl with bread; stir in seasoning blend, salt, and pepper.
Slowly pour in broth and toss gently.
Let bread cool.
Preheat oven to 350°F.
Transfer bread to prepared baking dish and cover with foil.
Bake until an instant-read thermometer inserted into the center of stuffing reads 160°F – about 30-40 minutes.
Bake, uncovered, until the stuffing is browned and crisp on top!
Serve and Enjoy!
Stuffing can be made up to a day ahead of time – simply place in refrigerator and cover with airtight plastic wrap and refrigerate until almost ready to serve – pop in 350 degree oven until piping hot, about 20 minutes.