In a large skillet over medium heat, warm the olive oil, then add the sausage and cook until browned on both sides. Add the garlic and cook about 30 seconds.

Add the tomatoes (if you want, you can blend one can in the blender until smooth - I just left both of mine as is because I was in a hurry) and half-and-half, stir and bring to a simmer. Add the tortellini, and cover, letting it cook for about 10 minutes, until your tortellini is tender. Salt and pepper to taste, then stir in the chopped spinach.

Serve hot!