Oven roasting is going to work well if the tempeh has some moisture added before roasting and you use some oil for roasting.
Moisture is added with either a marinade or a brine containing some salt and something a little sweet.
Tempeh pairs particularly well with sweet potatoes and onions, pepper and tomoatoes.
You can cook them all together in one pan.
Serve with a salad and carbohydrate of your choosing.
Leftovers are amazing and can go in handpies, tamales, quiches, soups and stews.
2 cups water
1/4c brown sugar
Brine or marinade up to a day ahead. Toss with 2-3 T oil and place on a cookie sheet. Add other vegetables. Oven Roast at 375 for up to 30-40 min.