Yes, you can bake the dip in an ovenproof skillet or baking dish if you don’t want to use the sourdough bread bowl.  In step 4, use a large ovenproof frying pan. I used an 11-inch cast iron skillet with great results, but you’ll want to cook the cheese filling for just 3 minutes total instead of 5 minutes because it thickens quicker in cast iron.  Bake the dip in the skillet at 375FºF for 15 minutes. In step 8, if desired, broil the dip but for longer, 3 to 5 minutes, or until golden brown in spots.  Don’t forget to buy crackers or make croutons/crostini for dipping.