Step 1

Preheat the oven to 400°F. In a large bowl, toss the bread with ¼ cup oil; it will feel saturated. Season the bread with salt and pepper to taste. Spread it onto a sheet pan in a single layer, reserving the bowl. Transfer the pan to the oven and toast the bread for 15 to 20 minutes, or until golden. Set it aside to cool briefly.

Step 2

Meanwhile, in a large sauté pan, melt the butter with the remaining ¼ cup oil over medium heat. Add the onions and celery, season with a pinch of salt, and cook for 5 to 10 minutes, stirring, until soft and beginning to color.

Step 3

Return the toasted bread to the reserved bowl. When the onions and celery have finished cooking, scrape them into the bowl over the bread. Sprinkle with the Bell’s. Add 1 cup stock, ½ teaspoon salt, and pepper to taste. Toss. Taste and adjust the seasoning, adding salt and pepper as needed — this is your chance to get the seasoning right before you add the egg. In a small bowl, whisk the remaining ½ cup stock with the egg and add it to the bowl. Toss them to combine.

Step 4

Grease a 9 × 13-inch baking pan with the softened butter and spread the mixture into it. Cover the pan with foil, transfer it to the center rack of the oven, and bake the stuffing for 30 minutes. Uncover the pan and bake the stuffing for 10 to 15 minutes more, until the bread is golden. Remove the stuffing and let it stand for 10 minutes before serving it.