Peel and chop the onions. Peel and wash carrots and cut them into 8-9 cm long sticks. Heat 1 tablespoon butter in a pot and fry onions and carrots. Add frozen beans and 1⁄4 l water and bring to the boil.
Season with salt and pepper. Cover and cook for about 3 minutes. Drain and collect the cooking water.
Dab the schnitzel dry, halve and tap flatter. Season with salt and pepper. Spread some beans and carrot sticks across the escalopes. Roll up and pin.
Wash the thyme, shake dry and pluck the leaves. Fry the escalope rolls in hot oil until they are well done. Fry the green peppercorns briefly. Pour in vegetable cooking water and bring to the boil.
Add broth and thyme. Cover and stew for 10-12 minutes.
Remove the rolls from the sauce. Pour on cream, bring to the boil. Thicken slightly with sauce thickener. Season to taste with salt and pepper. Put the rolls back into the sauce and let them steep for a short time.
Heat 1 tablespoon of butter. Add the remaining bean and carrot mixture and 5 tbsp. water. Cover and steam for about 5 minutes. Season to taste again. Serve with the schnitzel rolls with sauce. Boiled potatoes taste good with it.
Drink tip: dry white wine, for example a strong Chardonnay.