1 box (8 ounces) cannelloni or manicotti pasta (about 12 shells)
1 cup ricotta cheese
3/4 cup grated Parmesan, plus 1/4 cup for sprinkling
1 egg yolk
1/2 cup chopped fresh basil leaves
1 pound lump crabmeat
1/4 teaspoon salt
1/4 teaspoon freshly ground white pepper
Bring a large pot of salted water to a boil over high heat. Add the pasta and cook until tender but still firm to the bite, stirring occasionally, about 8 to 10 minutes. Drain pasta.
In a large bowl, mix together ricotta, 3/4 cup Parmesan, egg yolk, basil, crab, salt, and pepper.
Preheat oven to 350 degrees F.
Fill the cannelloni with the crab mixture and place in a buttered baking dish. Sprinkle with the remaining Parmesan cheese. Bake until bubbly and the top is golden brown, about 15 to 20 minutes. Serve immediately.