The phrase "healthy pinch" means using a moderate or reasonable amount of something when cooking or adding flavor, usually salt or spices. Full definition
pickled daikon: 1/2 cup rice vinegar 1/4 cup sugar healthy pinch of salt 1 cup thinly sliced daikon 1/2 tsp tumeric, for color (morestomach.com)
In a blender add the cooked tomatillos strained, 1/4 cup of water in which the tomatillos where cooked, charred onion, chiles, fresh cilantro, raw garlic, and few healthy pinches of sea salt. (yes-moreplease.com)