1In a medium saucepan, bring 4 cups of water to a gentle simmer over medium heat.
Add the miso paste to the simmering water, stirring until it is completely dissolved.
Gently add the cubed tofu to the soup and let it heat through for about 2-3 minutes.
Add the chopped green onions and nori strips to the soup, stirring gently.
Allow the soup to simmer for another 1-2 minutes, ensuring all ingredients are heated through.
Remove from heat and serve the miso soup hot, garnished with additional green onions if desired.