Boil a large pot of salted water.
Add the tortellini and cook according to package instructions until al dente.
While the tortellini is cooking, heat olive oil in a skillet over medium heat.
Add garlic powder and sauté for about a minute.
Stir in the marinara sauce and simmer for 5 minutes.
Add the fresh spinach and cook until wilted.
Drain the tortellini and add it to the skillet.
Toss to coat the tortellini with the sauce.
Season with salt and pepper to taste.
Serve hot, topped with grated Parmesan cheese and fresh basil.