Easy Chicken Sliders

Name: Easy Chicken Sliders
Prep time: 5 min
Cook time: 25 min
Total time: 30 min
Cuisine: American
Ingredients: 1 sheet sandwich rolls {I like to use Hawaiian sweet rolls, sliced in half}; 3 cups shredded rotisserie chicken {or you can use leftover shredded turkey}; 1 cup shredded mozzarella cheese {or cheese of your choice}; 1/4 red onion, sliced thin; 1/3 cup butter, or more as desired; 2 Tablespoons dijon mustard; 1 teaspoon paprika; 1/2 teaspoon garlic powder; 1/2 teaspoon onion powder; 1/2 teaspoon crushed red pepper {optional for spice}; 1/2 teaspoon salt; 1/8 teaspoon black pepper