Zesty Shrimp and Tomato Scampi

Bring a large pot of lightly salted water to a boil over high heat. Once boiling, add the penne pasta and return to a boil. Cook uncovered, stirring occasionally, until the pasta is cooked through yet still al dente, about 11 minutes. Drain the pasta in a colander.

In a skillet, heat the olive oil over medium heat. Add garlic and onion, cooking and stirring until the onion becomes soft and translucent, about 5 minutes. Add the tomatoes and simmer until heated through, about 5 more minutes. Stir in lemon juice and shrimp. Cook and stir until the shrimp are pink and cooked through, about 5 minutes. Add parsley and season with salt, pepper, and red pepper flakes. Serve the shrimp and sauce over the cooked penne pasta, garnishing with Parmesan cheese.