2 mackerel tuna (4 filets) 1 tomatoes, cut into pieces 2 lemons, juiced 5 Tbsp cooking oil 100 cc water GROUND SPICES 5 onions 1 clove garlic 10 red chilis 1 chunk kencur 2 chunk ginger SAMBAL SAUCE 5 red chilis 50 grams cayenne pepper 100 gr curly chilis 10 hazelnuts 5 shallots 2 cm piece galangal 2 cm piece turmeric 2 tsp salt 1 tsp sugar 2 Tbsp coconut milk powder 500 gr lemongrass, white part and thinly sliced VEGETABLES 50 g carrots , diced 50 grams green beans, cut into medium pieces 75 g young corn