First, you'll need to steam the tortillas. Place tortillas on a plate and cover with a clean kitchen towel. Microwave for 45 seconds. Remove tortillas from the microwave leaving towel on top and let sit for another few minutes.
In a small bowl, mix the shredded chicken, salt, pepper finely chopped onion and jalapeno.
Place about 2 tablespoons of chicken filling on the end of the tortilla. As tight as you can, without ripping the tortilla, roll all the way up. Use a toothpick to seal the taquito.
Baking Instructions: Preheat oven to 400 degrees. Arrange taquitos on a parchment paper lined or lightly oiled baking sheet. Lightly baste outside of taquitos with oil. Bake taquitos for 15 minutes or until nice and golden.
Frying Instructions: Heat oil in a small frying about a third of way up the side to medium heat or 350 degrees.
Place about 3-4 taquitos in the hot oil for about 1-2 minutes then using tongs, gently flip taquito over. When nice and golden, transfer taquitos to a cooling rack. Repeat with remaining taquitos.
Serve taquitos with your favorite dipping sauces like sour cream, salsa, or guacamole.