Preheat the oven to 375 and bring a pot of water to a boil. Grease a square baking dish.
Chop tempeh into cubes - the thinner they are, the crispier they get. I prefer them a bit larger, about 1/2 - inch squares. Set aside momentarily.
Cube your sourdough and arrange in your baking dish. Drizzle a generous amount of olive oil, then sprinkle the Italian seasoning, garlic powder, salt and pepper. Toss gently until well-combined. Bake for 30 minutes, stirring once halfway through cooking in order to brown all sides of the croutons.
Once your water has started boiling, add in your cubed tempeh and let it boil for 10 min. This process helps to remove the bitter fermented taste. Strain the tempeh then toss in the oil, tamari, maple syrup, and paprika. Let marinate while the croutons continue to bake.
As soon as the croutons are done, remove them from the baking dish and replace them with the tempeh. Turn the oven up to 425 and place in the oven right away.
Bake the tempeh for about 30 minutes to an hour. This all depends on the thickness of your tempeh. The goal is a crispy, bacon-like texture. I personally like mine a bit larger and undercooked, so I bake them about 45 minutes. Keep an eye on them and remove them when you’re satisfied with the level of crisp. I recommend taking them out after 25 min to give them a quick stir.
Alternatively, you can pop them in the air fryer for about half the time, or pan fry them.