Cook pasta to al dente. Don't overcook or it will fall apart when added to sauce
In a large bowl, mix sour cream, egg, cheeses, basil and oregano
Gently stir in the shredded chicken and chopped spinach
Pour pasta mixture into a greased 8X8 baking dish and stir in 1/2 cup milk, and more if the sauce is too thick.
Drop tablespoons over pesto over the top, then take a large spoon or spatula and spreading out over the top of the noodles
Cover and bake 40-45 minutes at 350
Combine bread crumbs with melted butter stir together and set aside. Cover and bake for 40-45 minutes at 350. Break the crackers into small crumbles, add the melted butter, and stir together
Remove cover, stirring in the other 1/2 cup of milk, sprinkle the bread crumbs on top, and bake uncovered an additional 10 minutes or until top is golden brown
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