Chicken and Sausage Sandwiches with Sauteed Bell Peppers and German Potato Salad

Name: Chicken and Sausage Sandwiches with Sauteed Bell Peppers and German Potato Salad
Ingredients: 4 teaspoons olive oil; 4 red bell peppers, seeded and sliced; 1 large yellow onion, thinly sliced; 4 reserved cooked chicken breast halves, sliced into thin strips; 1 cup diced chorizo or andouille sausage; 2 tablespoons balsamic vinegar; Salt and ground black pepper; 4 long rolls (submarine or hoagie rolls); 6 small to medium Yukon gold potatoes, cut into 2-inch pieces; 1/2 cup chopped green onions; 4 slices turkey bacon, cooked until crisp; 3 tablespoons apple cider vinegar; 1 tablespoon olive oil