Prepare all your ingredients by mincing the garlic, chopping the spinach, and measuring out the diced tomatoes, vegetable broth, and heavy cream.
In a large pot, bring water to a boil. Add a pinch of salt and then the refrigerated cheese tortellini. Cook according to package instructions, usually about 3-5 minutes. Drain and set aside.
In a large skillet, heat the olive oil over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant. Stir in the undrained diced tomatoes and vegetable broth, and bring to a gentle simmer.
Add the cooked tortellini to the sauce, gently folding to coat. Reduce heat to low, stir in the heavy cream and dried basil, and season with salt and pepper. Cook for an additional 2-3 minutes.
Remove from heat and stir in the chopped spinach. Sprinkle grated Parmesan cheese over the top and serve immediately, garnished with fresh basil leaves if desired.