Toss tomatoes with next 3 ingredients in large bowl; spread onto bottom of 12x8-inch baking dish. Bake 1 hour; cool. Chop tomatoes coarsely, reserving any juices.
Brown sausage in large skillet on medium-high heat, stirring occasionally; drain, if necessary. Stir in spinach; cook on medium heat 2 to 3 min. or just until spinach is wilted, stirring occasionally. Stir in tomatoes, reserved juices and 2 Tbsp. Parmesan. Remove from heat.
Place bread, cut sides up, on baking sheet; top with half the mozzarella. Cover with sausage mixture.
Bake 12 min.; top with remaining mozzarella and Parmesan. Bake 8 min. or until mozzarella is melted. Sprinkle with oregano.
Substitute 1 tsp. dried oregano leaves for the fresh oregano.
Calories From Fat
% Daily Value*
Total Fat 9g
Saturated Fat 4g
Trans Fat 0g
Total Carbohydrates 18g
Dietary Fiber 1g
* Percent Daily Values are based on a 2,000 calorie diet.
* Nutrition information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin and freshness of ingredients used.