This crunchy pressed sandwich is filled with a flavorful combination of prosciutto, pesto, peppers, tapenade, and cheese. If you have a sandwich press, you can use it to grill the panini.
Preheat oven to 200 degrees. Spread a ciabatta half with some pesto, and layer with prosciutto and mozzarella. Spread some tapenade on other half; layer with peppers and fontina. Cover with remaining bread.
Heat a griddle or cast-iron skillet over medium-low heat. Brush bread with oil. Place a sandwich in skillet; weigh down with another skillet. Cook until golden brown on first side, 3 to 4 minutes; flip, and cook until other side is golden and cheese has melted, 3 to 4 minutes more.
Transfer to a baking sheet; keep warm in oven while grilling other sandwich. Cut each half into pieces. Serve immediately.