Preheat oven to 425 degrees.

Slice baguettes into 18 equal pieces.

Combine in a small bowl, mayonnaise, parmesan, onion, garlic, pepper and basil. 

Spread mixture evenly on to crostini. 

Bake or 10-15 minutes until golden brown. 

Remove from oven and top with tomato. 

Garnish with a sprinkle of parmesan cheese and parsley (optional). 

Serve warm.  Enjoy!!