Preheat oven to 400°F. Grease a casserole with a cover. Cook pasta al dente, according to package directions. Drain and set aside. In a bowl, combine cheeses, eggs, garlic, herbs, and salt and pepper. Fold in bread crumbs. Stuff each shell with the cheese-herb mixture. Arrange stuffed shells in prepared casserole. Add marinara sauce to cover. Cover and bake for 10 minutes, until filling is hot.