Mix spelt, millet semolina, flour, 1 egg and salt to a thick mass. Cut the fat into pieces, add and knead quickly to a smooth dough. Chill for 1-2 hours. In the meantime, clean and wash the broccoli and divide into small florets.
Steam in boiling salted water for 3-5 minutes, drain well. Clean, wash and halve the peppers and cut them into half rings. Whisk crème fraîche and remaining eggs and season with salt, pepper and nutmeg.
Grease an ovenproof dish or springform pan (26 cm Ø). Roll out the dough into a circle (30 cm Ø), place it in the form and press the rim slightly. Spread the vegetables on the dough and pour egg mixture over it.
Bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for about 50 minutes. Cover with baking paper if necessary in between.