In a large skillet over medium heat, sauté the diced onion until translucent (about 3–4 minutes). Add minced garlic and cook for another 30 seconds until fragrant.
Add ground beef to the skillet and season it with salt, pepper, chili powder, and cumin. Cook until browned, then drain any excess fat before proceeding.
Pour in the enchilada sauce and bring it to a gentle simmer, allowing all the flavors to meld together beautifully.
Add chunks of cream cheese into the mixture and stir until fully melted and well combined into a smooth sauce.
Fold in the cheese tortellini carefully. Cook on medium-low heat for about 5–7 minutes until they are tender and heated through.
Sprinkle shredded mozzarella on top of the tortellini mixture. Cover and cook for 2–3 minutes or broil briefly until the cheese is bubbly and slightly golden. Garnish with fresh cilantro if desired and serve hot!