Prepare the tofu
Press tofu for 15 minutes. Cube and pat dry. Toss with a little soy sauce and oil. Pan-sear until golden and crisp. Set aside.Cook the mushrooms
Heat oil in a large pot. Add mushrooms with a pinch of salt. Cook until browned. Remove half for topping.Build aromatics
Add garlic, ginger, and scallion whites to the pot. Cook briefly until fragrant.Make the broth
Add vegetable broth, soy sauce, maple syrup, and chili paste. Bring to a gentle simmer and cook for 8–10 minutes.Add vegetables
Stir in spinach, carrots, and corn. Cook for 2–3 minutes until just tender.Cook noodles separately
Boil noodles according to package instructions. Drain and rinse lightly. Do not overcook.Finish the broth
Turn heat to low. Mix miso with a little hot broth, then stir into the pot. Add sesame oil and rice vinegar. Adjust seasoning.Assemble
Divide noodles into bowls. Pour hot broth over. Add tofu and mushrooms. Top with scallions, sesame seeds, and extras.Serve
Serve hot with a squeeze of lime if desired.