Spicy miso grilled chicken mixes Japanese and Korean flavour for great tasting grilling. If you don't have gochujang, you can just mix in another chili sauce. Sambal oelek or even Sriracha would work here. The chicken is delicious hot or cold.
If you don't have gochujang, you can use a different chili paste. Use 4 Tbsp shiro miso and add chili paste to taste.