Bring a large pot of salted water to a boil. Add the frozen tortellini and cook according to package instructions, usually about 3-5 minutes, until they float to the top.

In a skillet, heat olive oil and butter over medium heat. Add minced garlic and sauté for 1 minute until fragrant.

Add the chopped spinach and cook until wilted, about 2-3 minutes. Season with salt and pepper.

Drain the tortellini using a colander and add them to the skillet with the spinach. Toss gently to combine.

Sprinkle grated Parmesan cheese on top and serve immediately.