Spray a 9 x 13-inch baking pan with nonstick cooking spray.
Cut tofu into 8 rectangles and place in pan. Set aside.
Prepare sauce:
Combine all sauce ingredients in a small pot.
Bring sauce to a boil over high heat.
Reduce heat and simmer for 5 minutes. Remove from heat and let cool slightly.
Pour sauce over tofu.
Bake tofu for 10 minutes, then flip.
Return tofu to oven, then bake 10 more minutes. Flip again, then cook for another 10 minutes (30 minutes total). The sauce should be thick and coat the tofu.
Remove tofu from oven and flip it around in the sauce a few times to coat.
Sprinkle with sesame seeds.
Prepare kimchi slaw:
While tofu is baking, mix together soy sauce, rice vinegar, sugar, sriracha, garlic, and ginger.
Add cabbage, carrots, and green onion, and mix well.
Set aside until tofu is ready.
Assemble sliders:
Top each bun with a few lettuce leaves, one tofu piece, and a big spoonful of kimchi slaw.
Serve immediately. Enjoy!
Notes
If you'd like, you can grill the tofu instead of baking it. You will need to thicken the Korean BBQ Sauce while it's cooking. Mix together 1 tbsp. cornstarch with 1 tbsp. water. After the BBQ sauce has simmered for 5 minutes, add just enough of the cornstarch mixture (whisking constantly) to thicken it to a BBQ sauce consistency. (Keep in mind that it will thicken more as it cools, so you don't want it super thick.) When the sauce has thickened, remove it from the heat and cool slightly. Brush the BBQ sauce on the tofu and cook on a medium-hot grill, brushing on more sauce as the tofu cooks. The tofu is already cooked, so it just needs to be heated through and a little caramelized around the edges from the sauce. Serve as directed in the recipe.