Spiralize your zucchini.: The smell of fresh zucchini is subtle and green, almost grassy, and you should see long, glossy ribbons when you finish. The texture is crisp and slightly moist, which means you want to spiralize right before cooking to avoid sogginess. A common mistake is spiralizing too early, which leads to watery noodles and diluted sauce, so keep them aside and dry them gently on a towel if needed.
Add the oil to a skillet on medium-high heat. Add the shrimp to the pan and cook for 2 minutes, stirring often.: When the olive oil heats, it will shimmer and smell faintly fruity, signaling readiness. Add the shrimp so they hit the hot surface and sizzle, creating little popping sounds and a light caramelized crust. The visual cue is a turn from translucent to opaque with golden edges. Overcrowding the pan lowers the temperature and causes steaming instead of searing, so cook in a single layer if possible.
Add the garlic, sweet chili sauce, lime juice, and cilantro. Cook for another 3 minutes or so, or until the shrimp are cooked.: As you add the minced garlic the pan will release a warm, savory aroma; stir quickly so it softens without browning. The sweet chili sauce will bubble and thicken slightly, turning glossy and sticky as it reduces. The lime juice brightens the mixture, and the cilantro gives a fresh lift. Watch the shrimp closely; they should curl and become firm, which is the sign they are done. Avoid overcooking, which makes them rubbery.
Add the zucchini noodles and stir/toss (e. g. with tongs) constantly for a minute or two, until they're slightly cooked and warmed up. Season with salt & pepper to taste and garnish with sesame seeds if using. Serve immediately.: When the zoodles hit the pan you will hear a softer sizzle and see them wilt a touch while keeping structure, becoming glossy from the sauce. Toss constantly so they warm evenly and pick up sauce without releasing too much moisture. The ideal texture is tender with a bite; letting them sit will create a limp texture and dilute the sauce. Season with salt and pepper to taste, and finish with a sprinkle of sesame seeds if using, then serve immediately.