Pork with flour

6 tablespoons vegetable oil, divided (plus more if needed) 1 1/2 cups chopped onions 1 cup diced carrot (1/2-inch dice) 2 tablespoons minced serrano peppers 3[...]

2 1/2 lbs pork shoulder, cut into one-inch cubes flour seasoned with salt and pepper, for dredging 1 tablespoon vegetable oil 1 large yellow onion , chopped 2[...]