Meanwhile, melt 1 Tbsp. butter in large nonstick skillet on medium heat. Add onions; cook 5 to 6 min. or until crisp-tender, stirring frequently. Add spinach and garlic; cook and stir 1 to 2 min. or just until spinach is wilted. Spoon spinach mixture into medium bowl.
Melt remaining butter in same skillet. Stir in flour; cook 2 min., stirring constantly. Gradually add milk, whisking constantly after each addition. Bring to boil, whisking constantly; cook and stir 5 min. or until thickened. Remove skillet from heat. Add nutmeg, pepper and 1/2 cup Parmesan to white sauce; mix well.
Add ricotta to spinach mixture along with 1 cup of the cheese sauce and 1/2 cup of the remaining Parmesan; mix lightly. Stir in crabmeat. Spoon into resealable plastic bag.
Drain pasta; rinse with cold water. Cut small piece off one bottom corner of filled plastic bag; use to squeeze enough crab mixture into both sides of pasta shells until shells are evenly filled with crab mixture. Place in 13x9-inch baking dish sprayed with cooking spray; top with remaining cheese sauce, then remaining Parmesan.
Bake 30 to 35 min. or until heated through.
The manicotti shells can be cooked ahead of time. Drain, rinse and cool. Place in single layer on baking sheet sprayed with cooking spray; cover with plastic wrap. Refrigerate up to 24 hours before filling and baking as directed.
Serve this main dish with a mixed green salad for a quick-and-tasty weekday meal.
Sprinkle with 2 Tbsp. chopped fresh basil or parsley before serving.
If you're not a fan of seafood, you can instead prepare this delicious recipe using chicken or ham. Just substitute 1 cup chopped cooked chicken or ham for the flaked crabmeat.
Calories From Fat
% Daily Value*
Total Fat 13g
Saturated Fat 7g
Trans Fat 0g
Total Carbohydrates 50g
Dietary Fiber 3g
* 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.