Mix all of the sauce ingredients together. Set aside.
Mix together the soy sauce and maple syrup. Pour in a ziplock bag with the tofu cubes. Marinate for 15 minutes.
Pour out the marinade. Toss the tofu with cornstarch in a bowl.
Heat up 2 tbsp of cooking oil in a large sauté pan or wok over medium high heat. Add in the tofu in a single layer. Let fry for 2 minutes without moving. Flip them over with a pair of tongs at let fry for 2 minutes on the other side.
Set the tofu aside.
Add in the last tbsp of cooking oil. Stir in the Sichuan peppercorns. Let cook for a minute until the oil smells aromatic. Discard the peppercorns.
Sauté the garlic, ginger, bean paste, and dried chilies for 1 minute.
Stir in the peppers and green onions. Cook for 2 minutes.
Pour in the sauce. Give it a couple of stirs. It will thicken fairly quick.
Stir in the tofu and the peanuts. Cook for 1 minute, then take off the heat.
Serve with steamed rice.