Instructions

1. Start by caramelizing the onions. Add the butter and oil to a large skillet over low heat and add the sliced onions. Season the onions with the sugar and salt, stirring to combine.
2. Cook over low heat for 30 minutes, stirring often, until the onions are dark brown and sweet.
3. Set aside and let cool.
4. Chop the hot dogs into a small dice and add to a medium bowl.
5. Add the mozzarella cheese and the cooled onions to the hot dogs and stir to combine.
6. Line up a few wonton wrappers and place a heaping teaspoon of the filling in the center.
7. Wet the edges of the wonton wrapper with water and fold over into a triangle, sealing the edges with your fingers.
8. Repeat with about 30 wonton wrappers until the filling is gone.
9. Heat your oil to 375 degrees.
10. Add a few wontons at a time to the hot oil and fry for 1 1/2 minutes until golden brown, turning them over halfway through cooking.
11. Set on a paper towel lined plate to drain and repeat with remaining wontons.