SPINACH-SAUSAGE EGG BAKE

1 pound bulk Italian sausage
1/2 cup chopped onion
1 jar (7 ounces) roasted red peppers, drained and chopped, divided
1 package (10 ounces) frozen chopped spinach, thawed and squeezed dry
1 cup all-purpose flour
1/4 cup grated Parmesan cheese
1 teaspoon dried basil
1/2 teaspoon salt
8 eggs
2 cups milk
1 cup (4 ounces) shredded provolone cheese

1 In a large skillet, cook sausage and onion over medium heat until meat is no longer pink; drain. Transfer to a greased 3-qt. baking dish. Sprinkle with half of the red peppers; top with spinach.
2 In a large bowl, combine the flour, Parmesan cheese, basil and salt. Whisk eggs and milk; stir into flour mixture until blended. Pour over spinach.
3 Bake, uncovered, at 425° for 15-20 minutes or until a knife inserted near the center comes out clean. Top with provolone cheese and remaining red peppers. Bake 3-5 minutes longer or until cheese is melted. Let stand for 5 minutes before serving.