Easy Mentaiko Pasta

Bahan-bahan (1 porsi)

• 3 shiso leaves (perilla/ooba)
• ¼ sheet nori seaweed
• 1 sac spicy salted pollock roe or cod roe (karashi mentaiko)
• 2 cups water
• ¼ tsp Diamond Crystal kosher salt
• 4 oz spaghetti
• ½ Tbsp unsalted butter
• 1 Tbsp milk
• 1 Tbsp heavy (whipping) cream
• ½ Tbsp soy sauce