[‘Use day-old bagels for better texture; fresh bagels can be lightly toasted before cubing.’, ‘Split everything bagel seasoning between the mixture and topping for balanced flavor.’, ‘Sharp cheddar cheese adds depth; mixing mozzarella gives a gooey texture.’, ‘Brown sausage well for added flavor; do not rush this step.’, ‘Whisk eggs and milk until combined but avoid over-whisking to prevent cracks.’, ‘Prepare casserole the night before and refrigerate for easy morning baking.’, ‘Tent casserole with foil if browning too quickly.’, ‘For richer flavor, substitute half-and-half for milk (may result in denser texture).’, ‘Vegetarian option: replace sausage with sautéed mushrooms or diced bell peppers and onions.’, ‘Gluten-free option: use gluten-free everything bagels or bread cubes with seasoning.’, ‘Dairy-free option: use unsweetened almond or oat milk and dairy-free cheese alternatives.’]