To transform your Cheesy Sausage Biscuit Breakfast Casserole. Into a gluten-free delight. Start by substituting the standard biscuits. With a certified gluten-free biscuit mix. Or pre-made biscuits. From your local grocery store. Ensure the sausage is also labeled gluten-free. As some brands may include gluten-containing fillers. Or seasonings. Finally, replace the traditional gravy mix. With a gluten-free option. Which usually uses cornstarch. Or another safe thickener. Instead of flour. With these simple swaps. You can enjoy this hearty, cheesy casserole. Without any gluten worries!