Cut the eggplants on an angle into chunks, about 1-inch thick (rotating the eggplant as you cut, this will give you nice chunks with sharp angles for aesthetics or slice as you would normally do.
Heat the wok over medium-high heat until it’s smoking lightly. Pour 2 tablespoons of oil swirling around the pan. Spread the eggplant in a single layer in the oiled wok. Reduce the heat to medium. Cook for 7-8 minutes, stirring occasionally until it starts to turn golden, soft, and translucent. Sprinkle a little salt so the eggplant release moisture and cooks faster.
Remove the eggplant from the wok and set them on a plate.
Bring the wok back to medium heat, add another 2 tbsp oil. Add the garlic, ginger, and cook for 30 sec-1 minute, until fragrant. Add the crumbled tofu and cook stirring for 5-7 minutes until crispy golden bits are seen. Allow some undisturbed contact time to crisp.
Stir in the Sichuan peppercorns and the spicy bean sauce in to the wok. Cook for 1 minute .Then add the stock, chili oil, sugar, and sesame oil. Let this simmer for a minute or so.
While the sauce simmers, combine ¼ cup of water in a small bowl with the cornstarch and mix until thoroughly combined to make a slurry.
Return the eggplant back into the sauce. Simmer, covered, for 5 minutes, add the cornstarch slurry, stir and simmer for 1 minute or so the sauce starts to thicken. Take it off the heat. Garnish with scallions and serve hot with rice or noodles.