To remove bitterness from the tempeh, add to rimmed skillet or saucepan filled with 1 inch of water and bring to a low boil over medium heat. Steam tempeh for a total of 10-12 minutes, flipping once at the halfway point. Then rinse, pat dry, and cut into thin, bite-size pieces. I prefer slicing the tempeh in half lengthwise then cutting into small triangles. (The smaller the pieces, the better they can soak up the marinade.) Set aside.
Mix marinade by adding chili, sesame oil, peanut butter, tamari, lime juice, and maple syrup. Whisk to combine. Taste and adjust flavor as needed, adding more crushed chili for heat, maple syrup for sweetness, lime juice for acidity, or tamari for saltiness. Don't be shy - you want this extremely flavorful!
Add the sliced tempeh to the marinade and toss to coat. Then cover and refrigerate for at least 2 hours, preferably 24 hours. I found that 24 hours infused the most flavor! While marinating, toss/stir occasionally to ensure even coating. (Pro tip: Just before baking, drizzle with a bit more maple syrup and tamari for extra flavor. Optional but recommended!)
Once marinated, preheat oven to 375 degrees F (190 C) and line a baking sheet with parchment paper. Add tempeh and reserve any leftover marinade to brush/coat the tempeh once baked.
Bake for 22-30 minutes or until caramelized and deep golden brown. Remove from oven and brush/coat with any remaining marinade.
This tempeh is delicious for adding to Asian-inspired dishes like spring rolls, salads, and noodle dishes! Store leftovers covered in the refrigerator up to 3 days. Best when fresh.