In a large bowl, combine the flour, sugar, salt and yeast. Add water, milk and butter; beat on low until well combined. , Turn onto a well-floured surface; knead until smooth and elastic, 6-8 minutes. Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 1 hour. , Meanwhile, in a large skillet over medium-high heat, cook sausage until no longer pink; drain and cool. Stir in the mozzarella, 2 eggs and basil; set aside. , Punch dough down; divide in half. Roll 1 portion into a 15x10-in. rectangle on a greased baking sheet. Spoon half of the sausage mixture lengthwise down 1 side of rectangle to within 1 in. of edges. , Fold dough over filling; pinch edges to seal. Cut 4 diagonal slits on top of stromboli. Repeat with remaining dough and filling. Beat remaining egg; brush over loaves. Sprinkle with Parmesan cheese. Cover and let rise until doubled, about 45 minutes. , Bake at 375° for 20-25 minutes or until golden brown. Slice; serve warm.