Bring a small pot of water to a boil over medium-high heat, add the kabocha squash and cook for 8 minutes. Drain the water and let cool.
Heat the oil in a large saucepan over medium heat, add the red curry paste and cook, stirring, for about 1 minute, then add the coconut milk and stir until well combined.
Heat the mixture for a few more minutes or until the oil begins to separate.
Add the kabocha squash, red and green bell peppers, tofu and vegetable broth, increase the heat to high and bring to a boil.
Once it’s boiling, continue cooking for 5 more minutes, then add the mango, sugar, tamari, Thai basil and snow peas, reduce to a simmer and cook for 6 more minutes.
Serve with steamed jasmine rice.