Unroll pie crust on a floured surface. Using a 2 inch round cookie or biscuit cutter cut out 24 circles.
Place rounds into an ungreased mini muffin tin. Press until it is fully lined.
Pinch edges to make a cute edge.
Prick bottoms with a fork and bake for 5 minutes or until set.
In a small bowl, season tomatoes with salt and pepper.
In a medium bowl, mix together mayonnaise, Parmesan, Muenster, and Havarti.
Spoon chopped tomatoes into shells evenly.
Top with a dollop of mayonnaise/cheese mixture.
Bake for 18-20 minutes. Serve while warm.