Clean and wash the broccoli and cauliflower. Divide both into florets. Peel, wash and slice the carrots
Cover the cauliflower and carrots and cook them for 10-12 minutes in little boiling salted water. Add broccoli after about 4 minutes and cook. Drain vegetables well
Layer the vegetables in a greased flat gratin dish (approx. 28 cm Ø). Whisk milk and eggs. Season with salt, pepper and paprika. Pour over the vegetables and bake in a preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for 30-35 minutes
Debark the toast, crumble finely. Sprinkle over the vegetables after about 15 minutes. Spread butter in flakes on top, bake until done. Served with: small roasted jacket potatoes