Beef Crostini are perfect when you're looking to serve a hearty appetizer. The pesto mayonnaise is a tasty topping.
If you don't want to roast the beef, it's fine to purchase sliced Italian roast beef at the deli. You'll need to cut the pieces to fit the bread.
The beef can be roasted up to 24 hours in advance. Wrap tightly and store in the refrigerator until serving.
Garnish the serving platter with fresh basil and rosemary, and Italian olives.
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