Adjust oven rack to middle position and turn broiler on high. Heat oil in a medium skillet over medium-low heat; Add hotdogs and cook,
turning occasionally, until golden brown, about 10 minutes.
Bring beans and barbecue sauce to a simmer over medium-low heat. Cover and keep warm. Pull some of the crumb from both sides of each roll. Broil until toasty brown, 3 to 4 minutes.
Spread mustard over each side of all the buns. Fill each with baked beans and a hot dog. Top with pineapple and onions. Serve.
Recipe by Three Many Cooks at https://threemanycooks.com/recipes/meaty-mains/kicked-up-hot-dogs/