Simple One-Pan Sausage Pasta - Kiolbassa

Ingredients

• 1 (12-ounce) package Kiolbassa Beef Smoked Sausage, sliced
• 1 tablespoon butter
• 1/2 sweet onion, chopped
• 2 cloves garlic, minced
• 4 cups chicken broth
• 1 (14.5-ounce) can fire-roasted diced tomatoes (undrained)
• 1 (16-ounce) box rotini pasta (uncooked)
• 1/2 cup heavy cream
• 2 teaspoons corn starch
• 1 to 3 cups baby spinach
• 1 cup shredded Italian blend cheese
• salt