- In a large pot of salted boiling water, cook the spaghetti al dente. Set aside 1/2 cup (125 ml) of the cooking water. Drain the pasta and oil lightly.
- Meanwhile, in a large skillet over high heat, brown the garlic and red pepper flakes in the butter. Add the shrimp and cook for 1 minute. Sprinkle with the flour and cook for 1 minute, stirring constantly. Add the clams with their brine. Bring to a boil, stirring constantly.
- Add the reserved cooking water, zucchini and peas. Cook for 1 minute. Add the pasta and toss to coat. Season with salt and pepper.