Pre-Heat oven to 350F and line a baking sheet with foil.
Heat up 1 tablespoon of oil in a large pan. Once the oil is heated up add in the 1 cup grated zucchini and cook for 5-7 minutes on medium heat. Just until you start to see it wilt and the water starts to cook out. Transfer to a small bowl.
Add in the steamed sweet potato and soaked and drained dates In a food processor or blender. I found that it's better to pre-chop the dates so that it blends better with the sweet potato. Pulse for a few minutes until the sweet potato and dates are blended together. It's okay if there are still tiny whole bits of dates.
Now prepare the Longganisa Embotido mixture. Add the 1 pound of ground pork, date and sweet potato mixture, cooked zucchini, eggs, garlic, soy sauce and paprika in a large bowl. With super clean hands mix it all together until fully combined. Wash your hands again.
Roll out foil (About 13 inches) and drizzle with oil.
Place the Longganisa Embotido mixture in the middle and form a long log. About 6-8 inches making sure it's even on all sides.
Wrap it all up tightly using the foil and place on top of a baking sheet lined with foil.
Bake in the oven at 350F for 1 hour. Take out of the oven and leave to rest for 10 minutes.
While the Longganisa Embotido is baking you can make the sauce. Mix together ½ cup ketchup, 1 tablespoon soy sauce, 1 tablespoon vinegar, 1 teaspoon diced garlic. Mix well and transfer to a small serving bowl.
Once the Longganisa Embotido has cooled down a bit unwrap the foil and cut into thick one inch pieces.
Place on a serving platter with the ketchup sauce in the middle.