Prepare chopped spinach according to package directions, either on stove top or in microwave. Drain liquid, then set aside while you prepare the rest of the dish.
Preheat oven to 350°F. Grease a 9"x13" baking dish and set aside.
In a large bowl, mix together spinach, tortellini, tomato sauce, ricotta cheese, basil, garlic, roasted red peppers, and parmesan cheese. Use a spatula or spoon to even out top of mixture. Over top, sprinkle mozzarella.
Cover dish with aluminum foil and bake for 25 minutes. Remove foil and bake for an additional 5 minutes, or until cheese is melted and tortellini are soft and cooked through.
Recipe for Tortellini Bake with Spinach and Roasted Red Peppers found here: https://www.mysequinedlife.com/tortellini-bake-spinach-roasted-red-peppers/