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Tags and nutritional info are auto-generated and may be inaccurate. Always check the full ingredient list before cooking.
Preheat the oven to 200°C. Grease a medium-sized ovenproof casserole dish with butter.
Wash the cauliflower and broccoli, remove any tough stalks and cut the vegetables into small florets.
Bring a saucepan of salted water to the boil. Add the cauliflower and broccoli and cook until tender. Drain thoroughly to remove as much excess water as possible.
Melt the butter in a large saucepan over medium-low heat. Stir in the flour until a smooth paste forms, then remove the saucepan from the heat.
Warm the milk slightly and gradually stir it into the butter and flour mixture, mixing continuously to prevent lumps from forming.
Return the saucepan to low heat and stir continuously until the sauce boils and thickens. Season with salt and black pepper to taste.
Add approximately 28 g of the breadcrumbs to the sauce and simmer gently for 3–4 minutes, stirring occasionally. Remove from the heat and allow the sauce to cool slightly.
Separate the egg yolks from the whites. Beat the egg yolks and stir them into the slightly cooled sauce. Add the grated cheddar cheese and mix thoroughly.
Mash the cooked broccoli and cauliflower together, then add them to the cheese sauce. Mix until the vegetables are evenly coated.
In a clean bowl, whisk the egg whites until stiff peaks form. Gently fold the egg whites into the vegetable mixture, taking care not to knock out too much air.
Spoon the mixture into the prepared casserole dish, filling it no more than three-quarters full to allow room for the puff to rise.
Sprinkle the remaining breadcrumbs evenly over the top.
Bake for 30–40 minutes, or until the puff has risen and the top is golden brown.
Serve immediately while hot and fluffy.
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Drain the vegetables well: Excess water can make the cheese puff heavy and prevent it from rising properly.
Fold gently: Carefully incorporate the beaten egg whites to help create a light, airy texture.
Serve immediately: The puff will naturally begin to sink as it cools, so serve it straight from the oven for the best results.
Can I use frozen vegetables?
Yes, but make sure to thaw and drain them thoroughly to remove excess water.
How do I prevent lumps in the cheese sauce?
Warm the milk slightly and add it gradually to the butter and flour mixture while stirring continuously.
Can I prepare this dish in advance?
You can prepare the components in advance, but it's best to bake it just before serving for the fluffiest texture. This dish is like a souffle.
What can I serve with this dish?
Serve alongside roast chicken or grilled meat, or enjoy as a meat-free main dish with a fresh green salad.
How do I know when the puff is done?
The puff is done when it has risen and the top is golden brown.
