Soak the green spelt overnight in 1/2 litre water. Peel and halve onions, remove the inside with a kitchen knife and chop. Heat oil in a pot, fry chopped onions in it and dust with curry.
Add the green spelt with the soaking water and bring to the boil. Stir in the vegetable stock and simmer for about 20 minutes. In the meantime clean, wash and finely dice the peppers. Wash the coriander, dab dry and chop finely, except for a few leaves for garnishing.
Stir the diced peppers, coriander and sour cream into the green spelt curry. Season to taste again. Cook onion halves in boiling salted water for about 5 minutes. Take out and measure 200 ml vegetable water. Fill onions with green spelt curry.
Coarsely grate the cheese and spread over it. Put onions in a fat pan, pour on vegetable water and bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 25 minutes. Arrange onions on a plate with stock and garnish with remaining coriander leaves.