Heat the avocado oil over medium-low heat in a large skillet.: You'll notice the oil begin to shimmer gently when it is ready, but do not let it smoke, because that will make the aromatics bitter. The low, steady heat allows the shallot and garlic to release their sugars slowly, producing a golden color and sweet, toasty aromas. A common mistake is cranking the heat too high, which causes uneven browning and burnt bits, so keep an attentive eye and adjust the flame as needed. Listen for a soft sizzle rather than an aggressive pop, and tilt the pan slightly to test heat distribution.
Once hot, fry the sliced shallot and garlic chips with a pinch of salt for 2-3 minutes until golden brown.: As the slices hit the oil you'll hear an immediate gentle sizzle and see small bubbles forming at the edges, and within moments the color will progress from pale to honeyed. The salt helps draw moisture out so the pieces crisp up rather than steam. Watch closely and stir occasionally so the slices brown evenly; burnt flecks will impart a bitter taste. If pieces finish unevenly, remove the golden ones first and let the rest finish briefly off heat to avoid overcooking.
Transfer to a paper towel-lined plate and reserve the oil.: Placing the fried shallot and garlic on paper towels drains excess oil and preserves their crisp texture. You'll smell a deep, nutty aroma that signals they are properly caramelized. Reserving the oil captures those flavors for the dressing, which helps the overall salad taste cohesive. One trap is letting the chips sit in oil and become soggy; spreading them in a single layer prevents that and keeps them snappy.
In a large bowl toss together the zucchini noodles, rice noodles, coleslaw mix, bean sprouts, carrots, serrano peppers, cilantro, Thai basil, mint, fried shallots, and garlic.: When you mix the components, you'll feel the contrast between silky rice noodles and crisp vegetables under your spoon, and the herbs will release a fragrant perfume. Toss gently to avoid bruising delicate ingredients, but thoroughly enough so everything is evenly distributed. Overmixing can macerate the veggies, producing unwanted liquid, so fold with care. If the noodles clump, a light drizzle of reserved oil can help them separate.
Drizzle the dressing over the salad and toss.: As the dressing hits the bowl the lime and ginger will smell bright and citrusy, while the reserved fried oil adds a warm, savory backbone. Toss to coat every strand and leaf, ensuring small pockets of flavor throughout. A frequent error is adding too much dressing at once; start with most of it and reserve a bit to adjust after tasting. The salad should glisten slightly, not be drenched, which keeps textures intact.
Season to taste with salt. Serve immediately.: After tasting, add the final kosher salt sparingly to lift flavors without overpowering the herbs. Serving right away preserves the crispness of the fried chips and raw vegetables; the salad is best when textures are contrasting. If you let it sit too long, the zucchini and cabbage will release water and the crunchy elements will soften, so plan to eat it soon after assembly. Garnish with extra green onions if you like for a fresh finish.
In a small bowl, whisk together the dressing ingredients.: When you mix lime juice , grated ginger , fish sauce , and honey with the reserved oil, you create a balanced emulsion that clings to noodles and vegetables. Whisking briefly brightens the ginger and dissolves the honey, resulting in a cohesive dressing with a fragrant profile. If not whisked well, the oil may separate, leading to uneven flavor distribution, so whisk until slightly emulsified. Smell the dressing as you go; it should be tart, zesty, and rounded with a salty umami note.