In a large mixing bowl, combine the kimchi, mushrooms, onions, green onions, shallots, garlic, ginger, and seasonings. Toss well and let marinate for 15 minutes.
1 cup kimchi, 1 cup shiitake mushrooms, ½ onion, ⅓ cup green onions, 1 Tbsp shallots, 1 Tbsp garlic, ½ Tbsp ginger, 1 Tbsp tomato paste, 1 Tbsp gochujang, ½ Tbsp soy sauce, ½ Tbsp sugar, ½ tsp turmeric, 1 tsp black pepper