Heat the olive oil in a large skillet over medium heat. Once hot, add the cabbage, sprouts, carrots, chestnuts, and ginger to the pan and cook, stirring frequently for 4-5 minutes until the vegetables begin to wilt but remain slightly crisp.
Mix the cornstarch with the water thoroughly.
Add the cornstarch mixture, soy sauce, and green onions to the large skillet. Cook for an additional 1-2 minutes or until the sauce thickens. Remove from heat and let cool.
Preheat the oven to 400 degrees. Spray a baking sheet with avocado cooking spray.
Place two tablespoons of the cooled mixture in the center of the egg roll wrap.
Fold the bottom up over the filling. Next, fold the two sides over, similar to an envelope, then roll it up like a burrito.
Place the rolled-up egg rolls on the baking sheet. Once you have rolled them all, spray the top of each egg roll with avocado cooking spray.
Place in the oven to bake for 8-10 minutes, then turn them over.
Bake for an additional 5-7 minutes, or until they are crispy & golden brown.
Serve with sweet chili sauce or sweet & sour sauce. Enjoy.