8 uncooked manicotti shells |
1 1/2 cups part-skim ricotta cheese |
1 cup (4 ounces) shredded part-skim mozzarella cheese |
1/3 cup grated parmesan cheese |
1 tablespoon chopped fresh parsley |
1/4 teaspoon pepper |
1 (10-ounce) package frozen chopped spinach, thawed and drained |
1 large egg, lightly beaten |
1 large egg white |
olive oil-flavored cooking spray |
2 1/2 cups marinara sauce |