Mix the cauliflower, dandelion, scallion, vinegar, gochujang, and chile flake in a bowl with a pinch of salt and let marinade for a half hour, stirring occasionally. Meanwhile make a quick dipping sauce with some sesame oil, chile flake, scallions, and soy sauce. Mix the flour into the cauliflower mixture, then add the water as needed to form a thick batter. Fry in a frying pan on high heat for about 4 minutes a side to brown and cook through. Serve with the dipping sauce. Makes 2 pancakes.