To pull this together, we rely on high-quality basics. Because the ingredient list is short, quality makes the difference between a good meal and a memorable one.

Cooking is a dance of timing. Start with your pesto, as it sets the aromatic tone for the whole kitchen.

1. The Pesto Base: In a food processor, combine your toasted walnuts, basil, garlic, and Parmesan. Pulse until coarse, then slowly drizzle in your olive oil while the motor runs. You want a texture that is emulsified but still has a little bit of rustic bite.
2. The Shrimp Sear: Heat a heavy-bottomed skillet over medium-high heat with a splash of oil. Once the oil shimmers, add the shrimp in a single layer. You want to hear that sharp, aggressive sizzle. Cook for about 2-3 minutes per side until they turn an opaque, perfect pink. Remove them immediately so they stay tender.
3. The Zoodle Toss: Use the same pan to quickly sauté the spiralized zucchini. This is a fast, high-heat process. We are talking 90 seconds, tops. The goal is to heat them through while keeping them snappy.
4. The Marriage: Remove the pan from the heat entirely. Add your pesto and the cooked shrimp back into the pan. Toss everything together gently so the pesto coats the ribbons of zucchini and the warmth of the shrimp finishes the sauce. Finish with a shower of fresh lemon zest to cut through the richness.

If you are planning your week, you can certainly prep ahead. Keep the pesto in a sealed glass jar in the fridge for up to three days—just press a piece of plastic wrap directly onto the surface to prevent the basil from oxidizing and turning brown.

I recommend keeping the zucchini raw until the moment you are ready to eat. If you spiralize them in advance, store them in a container lined with paper towels to absorb any moisture. Reheating this dish is best done in a wide skillet over medium heat for one minute; avoid the microwave, as it will inevitably turn your zucchini into a pool of water.