Clean and shine the mushrooms. Drain gherkins and cut into slices. Peel and halve onions and cut them into strips. Cut pork fillet into strips. Heat 1 tablespoon of oil in a pan.
Sauté the meat in portions and season with salt and pepper. Remove meat from the pan and heat 2 tablespoons of oil in the pan. Fry the mushrooms for 2-3 minutes. Fry the onions for the last minute.
Wash the thyme, dab dry and chop the leaves of 2 stems coarsely. Dust the mushrooms with flour, roast them briefly, then deglaze with broth. Bring to the boil while stirring, then add mustard, cream, thyme and sour cream.
Season the sauce with salt, pepper, some curry and lemon juice and let it simmer for 2-3 minutes. Heat butter in a pan and fry the spaetzle lightly in it. Add meat and cucumber to the mushrooms.
Arrange the shredded meat in a bowl and garnish with thyme. Serve with spaetzle.