Blackstone Griddle Caprese Tortellini

Name: Blackstone Griddle Caprese Tortellini
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: American, Italian
Ingredients: 1 20 ounce bag frozen cheese tortellini (thawed); olive oil; 1 pound chicken (optional) (cut into bite size pieces); 1 onion (diced); kosher salt, pepper, Italian seasoning; 8 ounces chopped fresh spinach; 1 pint grape or cherry tomatoes; 6 to 8 cloves garlic (minced); 1/4 cup balsamic vinegar; 1 1/2 cups shredded mozzarella cheese (plus more to sprinkle over top); 1/2 cup shredded parmesan cheese; Optional: basil for garnish