Great tuna casserole! You are right: supermarkets don't have as much as they used to, so sometimes we have to be inventive. I was not expecting that you were going to heat up the tuna a bit. I am sure cooking it with the onions and bell pepper made it very flavorful. Thanks for the tip about not overcooking the pasta. I always use whole wheat pasta, so that is not as much of a concern for me. You are right: the chips definitely acted as a kind of bread crumb topping. I am sure that it turned out great. Thanks for sharing, Ms. O! BTW: I will get to your comment on my channel, I promise. The world is crazy now, so I am behind on things--but I will get back to you!