Preheat your oven to a cozy 400°F (204°C).
First, let's get that cauliflower golden! In a large bowl, gently toss the small cauliflower florets with olive oil, sea salt, and black pepper until they're nicely coated. Spread them out in a single layer on a large baking sheet and roast for 25-30 minutes, or until they're beautifully golden and slightly caramelized. Keep the oven hot!
While your cauliflower roasts, whisk those 8 large eggs in a big bowl until they're light and airy.
Once the cauliflower is ready, spread it evenly at the bottom of a 9x13 inch baking dish. This is your wholesome, veggie-packed base!
Carefully pour the whisked eggs over the roasted cauliflower. Sprinkle 1 cup of the shredded cheddar cheese evenly over the eggs. Then, scatter the chopped Canadian bacon on top, followed by the remaining ½ cup of cheddar cheese.
Bake this delightful casserole for 18-20 minutes. You'll know it's done when the eggs are fully set, and the cheese is bubbly and golden brown.
While the casserole bakes, quickly prepare your hollandaise sauce if you're making it from scratch, so it’s fresh and ready.
Once out of the oven, let your casserole cool for about 10 minutes. This helps it set perfectly for easy slicing.
Finally, drizzle generously with the creamy hollandaise sauce and sprinkle with fresh chopped chives for that finishing touch. Serve warm and enjoy your effortlessly healthy brunch!