Sweet Balsamic Mayo chicken sandwich . You can cook Sweet Balsamic Mayo chicken sandwich using 8 ingredients and 3 steps. Here is how you achieve it. Ingredients of Sweet Balsamic Mayo chicken sandwich You need 4 of chicken breast halves. It's 1 large of white onion (sliced halve rings). Prepare 1 1/2 tbsp of Webers beer can chicken seasoning. Prepare 8 slice of Pepperidge Farm Hearty White bread. Prepare 2 cup of spring mix lettuce. It's 1 large of tomato (sliced). Prepare 4 slice of Muenster cheese. It's 2 tbsp of EVOO. Sweet Balsamic Mayo chicken sandwich instructions Sauce: 1/2 cup mayo, 1 tbs balsamic vinegar, 1/4 teaspoon garlic powder, 1/2 teaspoon cracked black pepper, 1/2 teaspoon dried oregano. Mix together and set aside.. Heat EVOO I'n a nonstick skillet on medium, uncovered. Add chicken and onions, sprinkle the seasoning over well. Wait till one ...