For the red curry paste, remove the outer leaves from the lemon grass, scratch the stem lengthwise and cut very finely. Clean, wash and chop the chilli with the seeds. (If you don't want it that hot, remove the seeds.) Peel ginger, shallots and garlic and dice everything finely.
Crush the prepared ingredients in the mortar little by little (see tip on the right). Add 1 tsp. salt, coriander seeds and shrimp paste and crush.
Dab meat dry and cut into thin slices. Wash and dice the tomatoes. Heat oil in a wok or a pan with a high rim. Fry the meat in it in portions on each side for about 1 minute.
Season with salt and take out.
Fry the curry paste and tomato paste in hot frying fat while stirring until it begins to smell. Add the tomatoes, sauté briefly. Deglaze with 200 ml water and coconut milk. Stir in peanut butter.
Bring to the boil and simmer for about 5 minutes.
Wash coriander, shake dry, chop leaves coarsely and stir into curry. Season with soy sauce and lime juice. Chop the peanuts. Clean and wash spring onions and cut into rings. Heat meat in curry briefly.
Sprinkle curry with nuts and spring onions. Serve with rice.