1.Wash and cut all the mentioned veggies.
2.In a saucepan, heat olive oil over medium heat. Add onion, garlic, and ginger, sautéing for 2 minutes. Then add the rest of the vegetables and sauté for about 5 minutes until they soften.
3.Add soy sauce and the seasoning, then mix well.
4.Turn off the heat, add green onions, and mix.
5.Transfer the mixture to a plate and set it aside.
6.Mix water with flour to seal the spring rolls with the paste.
7.Place a spring roll sheet on a flat surface, then add the filling inside and apply the flour paste to the end.
8.Fold both sides toward the center, then fold the top to the center and roll tightly.
9.Repeat until you finish using all the filling.
10.Place the prepared spring rolls in a ziplock bag and freeze them, or deep fry them fresh.
11.When needed, take them out of the freezer a couple of minutes beforehand, then deep fry, air fry, or bake them until crispy and golden brown.