Place a large pot over medium heat and add vegetable broth, coconut milk, tamari, red curry paste, and maple syrup. Taste broth and adjust by adding more curry paste, syrup, or tamari.
Add tofu, mushrooms, pepper, kale, and scallions. Simmer for 30 minutes or until the peppers and mushrooms are soft but not mushy. Add ginger, lime juice, and lime zest after removing from the heat.
Ladle soup into bowls. Garnish with avocado and cilantro.