Press the tofu for 20-30 minutes ideally using a tofu press or by placing the tofu on a plate with another plate on top of it and then piling some heavy things on top, like a heavy pot.
Chop the sweet potatoes and slice the mushrooms and get all the other ingredients ready to go.
When the tofu is pressed, cut into cubes and fry it in the sesame oil until lightly browned on each side. Set aside.
Add the massaman curry paste to a pot with a little coconut milk and fry the paste in the coconut milk.
When the paste is properly mixed in with the coconut milk, add in the rest of the coconut milk along with the soy sauce and the chopped sweet potato.
Simmer for around 5-10 minutes until the potato is just slightly softened and close to ready (but not all the way cooked).
Add in the mushrooms and simmer for a couple of minutes and then add the broccoli and simmer for another minute or two until the broccoli is al dente.
Add the peanut butter and coconut sugar and mix in.
Add the tofu last and mix in with the vegetables and sauce. Add sea salt and black pepper to taste.
Serve over rice, with crushed peanuts, fresh lime and cilantro.