Preheat oven to 400°F.
Combine ricotta, mozzarella and sundried tomatoes. Turn into ovenproof 1-quart baking dish. Sprinkle pine nuts on top. Top with a few dollops of pesto and and additional chopped sundried tomatoes if desired.
Bake 20 minutes or until hot and bubbling and pine nuts are lightly toasted.
Serve with crackers, crostini or breadsticks for dipping.