- Preheat oven to 375°F. Lightly oil an 8-by-8-inch casserole dish or 9-inch pie pan with olive oil or butter. Spread onions evenly in the dish and place in the oven while you prepare the other ingredients.
- In a small bowl, beat eggs, salt and milk with a whisk.
- Remove dish from oven with mitts and spread cauliflower and cheese evenly. Pour egg mixture over cauliflower, onions and cheese. Sprinkle with paprika.
- Bake for 30 minutes, until cauliflower is cooked and casserole is golden brown.