Place the shrimp in a large bowl with 1½ teaspoons kosher salt, 1 teaspoon crushed red pepper, ½ teaspoon black pepper, 1 teaspoon lemon zest, and 1 tablespoon extra virgin olive oil. Toss to coat. Transfer to the refrigerator for 20 to 30 minutes as you prepare the sauce.
Make the sauce:
Heat 1 tablespoon extra virgin olive oil in a large skillet over medium heat. Add the onion and zucchini and cook for 8 to 10 minutes, turning occasionally. Season with salt and pepper.
Simmer the sauce:
Add the cherry tomatoes and cook over medium heat until the skins begin to split. Use a fork or potato masher to break open the tomatoes to create a sauce. Season with salt and pepper. Turn the heat to low and simmer for 20 minutes, breaking apart any tomatoes as needed. Taste and add salt and pepper.
Cook the shrimp:
Add the shrimp to the skillet and cook for 5 to 10 minutes until almost opaque.
Add the basil and lemon juice and toss to combine. Once the shrimp are pink and opaque, turn off the heat.
To serve:
Transfer the shrimp to a serving platter and finish with more fresh basil leaves if you like. Enjoy!