Step 1

Preheat the oven to 325 degrees F. Spray a 9-by-13-inch baking dish with cooking spray.

Step 2

Heat a large skillet over medium-high heat. Add the sausage and cook, breaking it up and stirring with a wooden spoon, until the sausage is no longer pink and is crispy and brown in spots, about 5 minutes. Remove from the heat.

Step 3

Whisk the sour cream, heavy cream, ground mustard, garlic salt, kosher salt, black pepper and eggs together in a large bowl. Add the sausage, hash browns, both cheeses, bell pepper and scallions (reserving 2 tablespoons of scallions for serving) to the egg mixture. Fold to combine.

Step 4

Unroll the crescent dough and press it into the bottom of the prepared baking dish. Dock or pierce the dough with a fork, making sure the entire sheet of dough is evenly docked with holes. Pour the egg mixture over the dough and spread it evenly into the dish. Cover with aluminum foil and bake for 40 minutes. Remove the foil. The egg should be somewhat set, but still wet and light in color. Return to the oven and bake uncovered until the egg is completely set and it is browned on the top and sides, 20 to 25 minutes.

Step 5

Let the bake rest for at least 10 minutes. Sprinkle with the reserved scallions and serve warm or room temperature.