The current toast trend owes a lot to bruschetta, the age old Italian original that takes thick slices of rustic bread that have been brushed with olive oil and crisped in the oven and then layers on flavorful toppings for serving with an aperivito (and also for lunch). The topping here is a hearty mix of broiled chicken and zucchini plus arugula that's layered on sliced mozzarella, with oregano and olive oil the last minute garnishes.