Roast Beef Panini

1/4 cup mayonnaise 2 teaspoons sun-dried tomatoes , minced 1 teaspoon garlic , minced 1 teaspoon prepared horseradish 1 teaspoon ketchup 1 pinch cayenne[...]

10 slices rye bread 5 tablespoons mayonnaise 15 slices deli roast beef 1 green bell pepper 1 red bell pepper 1 yellow bell pepper 10 slices baby swiss cheese[...]

2 tablespoons butter 1 small onion , thinly sliced 2 tablespoons whole grain mustard 1/2 loaf ciabatta, split lengthwise 1/3 lb thinly sliced deli roast beef[...]