In a medium saucepan, heat oil over medium heat. Add onion and brown (cook for about 3-5 minutes). Add garlic and cook until fragrant, about 30 seconds (do not brown)
Add tomatoes and broth, and bring to a boil
Add chickpeas and salt/pepper; reduce to simmer and cook for about 20-25 minutes
While sauce is cooking prepare cheese tortellini per package instructions
Add sauce to pasta, and toss. Serve with Parmesan, and garnish with torn basil