Tempeh is fermented soybeans, making it a very healthy protein food.  The marinade used here is very flavorful and can be used with other proteins as well.  

Ingredients:

8 ounces of tempeh
1/4 teaspoon red pepper flakes
1 1/2 Tablespoon sesame oil
2 Tablespoons salted peanut or other nut butter

2 Tablespoons  of tamari of soy sauce
2 Tablespoon lime juice
​3 Tablespoon maple syrup

Directions:

To remove any bitterness from the tempeh, Steam tempeh for 10-12 minutes.   Then rinse, pat dry, and cut into thin, bite-size pieces.  Smaller pieces are best at soaking up the marinade.  Then set aside
Mix all the rest of the ingredients together to make the marinade, I found that using a small blender was helpful since the ingredients needed help blending.   Taste to adjust to your preference, adding more pepper for heat, maple syrup for sweetness, lime juice for acidity or soy sauce for saltiness.
Add the tempeh to the marinade and toss to coat.  Then cover and refrigerate for a least 2 hours, or preferably 24.  Toss or stir occasionally.  
  After marinating, heat the oven to 375 degrees.  Line a cookie sheet with parchment paper.  Add tempeh, reserve rest of marinate to brush on tempeh when baked.  Bake for about 25 minutes until golden brown.