- ½ cup diced onion
- 2 tablespoons water
- 1/3 pound Canadian bacon, diced
- ½ cup grated Cheddar cheese
- ½ cup grated Monterey Jack cheese
- 3 cups stuffing mix
- 5 eggs
- 2 cups milk
- ½ teaspoon dry mustard
- ½ teaspoon onion salt
In a small microwavable bowl, cook onion and water on high for 2 minutes. Drain and add bacon and cheeses. Toss to mix.
Layer stuffing along bottom of a 9-by-11-inch baking dish that has been prepared with nonstick cooking spray. Top with cheese mixture.
In a medium bowl, beat eggs, milk, mustard, and onion salt and pour over cheese mixture. Cover and refrigerate for several hours or overnight.
Preheat oven to 350 degrees.
Remove from refrigerator; uncover and let stand while oven heats. Bake in center of oven until puffed, golden, and knife inserted near center comes out clean, 45–50 minutes.