Step 1

Cook pasta according to package directions; drain. Set aside.

Step 2

Preheat oven to 375º F.

Step 3

Heat oil in large nonstick skillet over medium-high heat.

Step 4

Add garlic; cook, stirring frequently, for 1 minute.

Step 5

Add spinach, tomatoes, and basil. Season with salt and pepper; cook, stirring frequently, for 4 to 5 minutes.

Step 6

Combine spinach mixture, pasta, red pepper flakes (if desired), ½ cup mozzarella cheese, Parmesan cheese, and ricotta cheese in a large bowl; mix well.

Step 7

Place in a 2½ to 3-quart casserole that is lightly coated with spray. Bake, covered with aluminum foil, for 35 minutes. Remove foil.

Step 8

Top evenly with remaining ¼ cup mozzarella cheese. Bake an additional 10 to 15 minutes, or until cheese is bubbly.