Bring a large pot of water to a boil for the ravioli.
In a medium saucepan combine 1 cup heavy cream, 1/2 cup chicken broth, 1 teaspoon garlic powder, 1 teaspoon Italian seasoning, and 1/2 cup grated Parmesan cheese. Whisk over medium heat until the mixture is smooth and starts to thicken, stirring frequently.
Add 1 cup chopped spinach and 1/2 cup drained sun-dried tomatoes to the saucepan. Reduce heat to low and simmer, stirring occasionally, until the spinach wilts.
While the sauce simmers, cook 20 ounces refrigerated ravioli in the boiling water according to package instructions. Drain the ravioli.
Add the drained ravioli to the saucepan and gently toss to coat with the sauce, or spoon the sauce over the ravioli on plates. Serve immediately.