Wash the chops and pat them dry. Peel onions and dice them coarsely. Heat oil in a large pan, fry chops on both sides, then fry for 4-5 minutes on each side. Remove and keep warm. Fry the onions in the frying fat. Dust with flour and sauté briefly.
Add 250 ml water, bring to the boil while stirring and stir in the stock. Let simmer for 5 minutes. Clean and peel the radish and cut off large spirals with a spiral peeler. Stir mustard into the onion sauce, season with salt and pepper. Serve chops with sauce, radish and pretzels. Garnish with parsley