Spinach and Ricotta Calzones

These were really easy and good. I got the original recipe from here, but I changed/added a few spices from the original. Also, you could easily omit the meat from the recipe and make it vegetarian. I served mine with marinara on the side and roasted asparagus.
Ingredients
1 cup part-skim ricotta
3/4 cup (3 ounces) shredded part-skim mozzarella cheese
1/4 cup (1 ounce) grated Parmesan cheese
1 teaspoon dried basil
1/2 teaspoon oregano
1/4 teaspoon garlic powder
1/4 teaspoon black pepper
1 (10-ounce) package frozen chopped spinach, thawed, drained, and squeezed dry
1/2 cup cut up cooked ham, sausage, chicken, or ground beef
6 oil-packed sun-dried tomato halves, drained and chopped
1 (13.8-ounce) can refrigerated pizza crust dough or homemade
Cooking spray
Preparation
Preheat oven to 400°.

Combine first 9 ingredients.

Divide dough evenly into 5 pieces; pat each dough piece into a 5-inch circle. Spoon about 1/2 cup spinach mixture onto half of each circle, leaving a 1/2-inch border. Fold dough over filling until edges almost meet. Bring bottom edge over top edge; crimp edges of dough with fingers to form a rim. Place calzones on a baking sheet coated with cooking spray. Bake at 400° for 14 minutes or until browned.