Here's a good appetizer:

Chop fresh tomatoes and place in a bowl.
Add salt, pepper.
Chop fresh basil and add to bowl (no measurements here, sorry!)
Drizzle olive oil and some balsamic vinegar into bowl and stir. Let sit.

Slice a large wheel of brie in half length-wise. Place half of the brie into a pie dish. Place half of the tomato mixture on top of the brie. Replace the top of the brie (the "lid" if you will), and top with remaining tomato mixture. Bake at 350 for about 15 minutes or until heated through. Watch the brie so that it does not melt- or the lid will slide off. Serve with crackers or sliced french bread.

My brother in-law made this for us and we've adopted it as a favorite. A friend of mine also added pine nuts on top, which I think was a nice addition.