In the pot, melt the butter and sauté the chopped garlic until fragrant, about 2 minutes. Add the chicken broth and cheese rind and bring to a boil. Add the tortellini and bring back to a slow boil, cooking the tortellini until it’s about half done, about 5 minutes for frozen, less for fresh.
Add the tomatoes and liquid, reduce the heat and cook at a simmer until the pasta is tender, about 10 minutes. Add the chopped spinach and basil and cook until the leaves wilt, about 2 more minutes. Ladle into bowls and garnish with grated Grana Padano or Parmesan cheese.