In a large pot of salted boiling water, cook the beef tortellini according to package instructions until al dente. Drain and set aside, reserving a cup of pasta water.
In a large skillet over medium heat, melt the unsalted butter.
Add the minced garlic to the skillet. Sauté for about 1-2 minutes until fragrant, being careful not to burn it. Stir in the dried Italian herbs and red pepper flakes if using.
Toss in the halved cherry tomatoes and cook for 3-4 minutes until they start to soften.
Add the cooked tortellini and fresh spinach to the skillet. Gently toss everything together and add reserved pasta water as needed to achieve the desired sauce consistency.
Season with salt and pepper to taste. Keep tossing until the spinach is wilted and everything is heated through.
Remove from heat and serve immediately. Garnish with grated Parmesan cheese and fresh basil leaves for extra flavor.
Notes
Feel free to adjust the amount of red pepper flakes based on your spice preference.