Ddakgalbi

0.25kg chicken
1 1/2 Tbsp soy sauce
5 cloves garlic
2 Tbsp gochujang
2 Tbsp gochugaru
4 Tbsp water
1/2 tsp sugar
1/4 tsp blackpepper
1/2 cup onion
1/2 cup potato
1/4 cup carrot
1 green chili