Preheat the oven to 350 degrees F (176 degrees C). Spray an 8x8-inch casserole dish with Nonstick Cooking Spray (to taste).
Heat the Olive Oil (1 tablespoon) in a skillet over medium-high heat. Brown the Turkey Sausage Links (12 ounce) in it, crumbling it as it cooks. Set it aside to cool a bit when it is done.
Whisk the Egg (8), Milk (1/4 cup), HP™ Sauce (1 tablespoon), Minced Dried Onion (1/2 teaspoon), Dried Parsley (1/2 teaspoon), Salt (2 pinch), and Ground Black Pepper (2 pinch) together thoroughly in a bowl, making sure to get some air into it.
It's time to assemble! Lay out the Frozen Cauliflower Tots (1 bag) in the bottom of the casserole dish in an even layer. Stir the cooled sausage into the egg mixture and pour it all out evenly over the tots. Finally, sprinkle the Shredded Cheddar Cheese (4 ounce) evenly on top.
Bake the casserole for 45-50 minutes, until completely set and just starting to brown around the edge.
Sprinkle the Scallion (1 bunch) on top and let the casserole cool and set for 10 minutes.
Cut and serve immediately!