Keto Loaded Cauliflower Casserole—Bye Potatoes!

Ingredients

• 1 large head cauliflower (2 1/2 to 3 lbs), broken into bite-sized florets
• 2 tablespoons butter, melted
• 1/4 teaspoon black pepper
• 1/4 teaspoon sea salt
• 1/4 cup block cream cheese (2 oz.)
• 1/4 cup sour cream, divided
• 1 1/2 cup shredded cheddar jack cheese blend, divided
• 4 slices thick-cut bacon, cooked until brown & crispy, chopped/crumbled
• 3 green onions (white and light green portions only), finely sliced, divided