Make the Filling: Heat 2tsp oil in a saute pan, add onions, garlic, jalapeno and cook for 4-5 minutes or until the onions turn translucent.
Next add drained and rinsed beans along with ground cumin, chili powder and salt. Using the back of the spoon, mash the beans a little to make the filling creamy and thick. Cook for 5 minutes and set aside to cool a little.
In the meantime, fold the tortillas in damp paper towel and microwave for 30 seconds to make them a little pliable.
Place some of the bean filling in the lower half of the tortilla and top it with cheese. Fold the bottom of the tortilla onto the filling, then fold both the sides over and roll to the top. Repeat with the remaining tortillas.
Heat 2-3 tbsp oil in a saute pan or griddle, place the chimichangas in the oil seam side down and cook on medium flame until golden brown, about 3-4 minutes. Flip over and cook for another 2 minutes or until golden brown.
Serve hot with your favorite accompaniments (sour cream for me :-)