Heat a Blackstone griddle or a large skillet over medium heat and add the olive oil.
Once hot, add the sliced kielbasa and cook for about 5-7 minutes, stirring occasionally, until browned and heated through.
Add the diced bell pepper and minced garlic to the pan, sautéing for another 3-4 minutes until the peppers are tender.
If using fresh tortellini, cook it according to the package instructions until al dente. If using frozen tortellini, cook it according to package directions until heated through. Drain and set aside.
Incorporate the cooked tortellini into the kielbasa mixture, gently tossing everything together to combine.
Add the halved cherry tomatoes and fresh spinach, and sprinkle with Italian seasoning, salt, and pepper. Continue to cook for another 2-3 minutes, until the spinach is wilted and the tomatoes are tender.
Remove from heat and serve warm, garnished with freshly grated Parmesan cheese and basil leaves.
Notes
Use fresh or frozen tortellini based on availability.