Peel and dice potatoes and add to a pot of water. Bring to a boil and cook until tender.
While the potatoes cook, heat 1 tsp of olive oil in a pan and add diced onion and spices. Cook 3-4 minutes.
Add tempeh and cook for 5 minutes. Add peas and corn and cook until everything is warm, about 5 minutes.
Add in soy sauce and ketchup and stir.
Add filling to a square baking dish. Mash potatoes with oat milk and top the filling. Smooth out and sprinkle a little paprika on top.
Bake at 350F for 20 minutes until the potato topping starts to crisp.
Enjoy!