My mom makes these little crostinis (in Italian it means "little toasts"). There are a lot of things you can top these "little toasts" with. We love these. Be careful though...very easy to eat 10 at one sitting.
1-2 baguettes, sliced about 1/4" thick
2 c Shredded Mozzarella cheese (the thin shred)
Real bacon bits (mom doesn't measure but she said do not overload with bacon)
Onion, chopped fine (Don't overload the onions)
Mix all ingredients, except bread & mayo, with enough olive oil to blend well. Add enough mayonnaise to thicken like paste so you can spread easily. Spread mixture on baguette bread. Sprinkle with Parmesan cheese. Put in oven at 425 degrees until it is crusty and cheese is melted. Per my mom's instructions, do not put under the broiler. You can mix a couple of hours ahead of time & then all you have to do is spread on bread & pop into the oven.