Chop 3 cloves garlic finely and grate 2 cm ginger root. In a bowl, mix 120 ml ketchup, 60 ml gochujang, 2 tbsp mirin, 2 tbsp soy sauce, 2 tbsp brown sugar, 1 tbsp rice vinegar, the finely chopped garlic, the grated ginger root, and 2 tsp sesame oil. Stir everything well until the sugar is dissolved and the sauce has a smooth, well-mixed texture. If possible, let the sauce rest for 15-30 minutes so the flavours can fully develop.
Crumble 50 g feta. Finely chop handful coriander. Wash 200 g romaine lettuce thoroughly under cold water and dry it well. Tear the leaves apart and set aside.
Toast 1 tbsp sesame seeds briefly in a dry frying pan. In a bowl, mix 1 tbsp rice vinegar, 1 tbsp soy sauce, 2 tsp sesame oil, 1 tbsp gochugaru, and the toasted sesame seeds into a flavorful dressing. Add the romaine lettuce to this dressing and mix gently so all leaves are lightly marinated.
Chop 80 g pineapple finely, slice 2 spring onions into thin rings, and grate 1.5 cm ginger root. Peel and finely chop 2 cloves garlic. Cut 1 onion into 4 thick slices.