Drain baby and minced clams, reserving juice; set clams and juice aside.
Cook pasta according to package directions.
In a large skillet, sauté onion in oil and butter until tender. Add parsley and garlic and sauté for 2 minutes.
Add drained clams; sauté 2 minutes longer.
Combine cornstarch and clam juice, mix until smooth. Stir into skillet along with wine/broth.
Bring to a boil; cook and stir 1-2 minutes or until thickened. Stir in the basil, fish sauce, pepper and red pepper flakes. Cook for 1-2 minutes.
Serve sauce over pasta; sprinkle with Parmesan cheese.