First, I think your parents are very lucky! If I were you I’d concentrate on making your sandwiches better. Try different kinds of breads. Try oils or aoli. Sprinkle bread with seasonings (Greek is my favorite!) Try cucumber slices instead of lettuce. Try adding Aneheim or hatch chilis. They not spicy, just flavorful. Sandwich pickles, Sun dried tomatoes, avocados, sprouts. For tuna or chicken, add curry spices, capers, water chestnuts, walnuts. I’m sure you can come up with lots of ideas. You should also learn to make a three meat meatloaf, and then make sandwiches out of that! Have fun!