Spicy Ginger Seitan

Ingredients

• ["1--8 oz package seitan (such as White Wave brand), cubed", "2 T freshly grated ginger", "2 T garlic, minced", "3 shallots, minced", "2 T sugar", "1 t Thai hot sauce (Sriracha sauce) -- more or less to taste", "1/4 c. cilantro stems and roots (save leaves)", "1/4 c. soy sauce", "1 c. coconut milk", "1 t seasame oil", "2 T vegetable oil", "1 T. corn starch", "2 T vegetable oil", "1 c. carrots, cut on the bias", "1 c. broccoli stems, cut to 2\""