Preheat oven to 425 degrees and line a baking sheet with parchment paper. Mix olive oil, maple syrup, and spices in a small bowl. Toss half the marinade onto the butternut squash and spread squash onto the baking sheet. Try not to crowd the pan. Place the crumbled tempeh in a ziploc bag, add the rest of the maple marinade, seal the bag, and toss around until incorporated. Set aside.
Bake butternut squash for 15 minutes, toss, then continue baking for 10 more minutes. Remove from oven and set aside.
In the last 10 minutes of the squash's baking time, heat a skillet over medium. Add 1 tbsp of olive oil, swirl around, then dump in the tempeh and brown for 8-10 minutes, stirring occasionally. It will not darken as much as meat since it does not contain anywhere close to the fat content of beef or pork, but it will crisp up.
As the tempeh cooks, prepare your roasted corn. I use a frozen pre-roasted variety that requires nothing more than a stint in the microwave to prepare. You may roast your own corn if you are feeling ambitious!
Once all components are complete, build you tacos! Start with 2-4 tbsp of slaw (I just eyeball it, honestly), some squash, a few spoonfuls of tempeh, roasted corn, and finally garnish with whatever sounds tasty. I used vegan queso and salsa on mine.