In a mixer, beat eggs, sugar. Add salt, vanilla and baking powder. Add milk. Slowly mix in flour. Mix until smooth.
Fill iron skillet 1/4 full with canola oil. Heat very high until oil is very hot. Using a funnel, cover one end of funnel with your finger. Fill funnel with batter. With funnel over pan, remove finger and start letting batter hit oil. Go in all directions so funnel cake will stay together.
Using a large fork, lift up slightly to look at bottom of funnel cake. When bottom is golden brown, flip and cook other side. When fully cooked, put on plate and top with powdered sugar, fruit filling, etc.