According to Wikipedia:
Bruschetta (Italian pronunciation: [brusˈketta] ( listen)) is a food the origin of which dates to at least the 15th century from central Italy. It consists of grilled bread rubbed with garlic and topped with extra-virgin olive oil, salt and pepper. Variations may include toppings of spicy red pepper, tomato, vegetables, beans, cured meat, and/or cheese; the most popular American recipe involves basil, fresh mozzarella, and tomato. Bruschetta is usually served as a snack or appetizer.
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This is how I made mine.
Some homebaked bread,
Chopped tomatoes & onions, salt,pepper, olive oil and parsley....mixed well.
Slice bread into small squares (or whatever shape you fancy), spoon tomato-onion mix ( do I call this salsa?!) onto the bread. Top with sliced cheese and squeeze some mayo.
Put it into the grill till the cheese melts. Yum yummmm. :=)