Swiss Chard and Herb Fritters

Name: Swiss Chard and Herb Fritters
Ingredients: 1½ bunches Swiss chard (about 1 pound, 3 ounces), stemmed; 1 teaspoon kosher salt, divided, plus more; 1 tablespoon coriander seeds; ½ teaspoon caraway seeds; 1 bunch parsley; 1 bunch cilantro; 1 bunch dill; 3 medium onions, grated on large size box grater, excess water squeezed out using a paper towel; 1 tablespoon harissa pepper paste; ¾ cup plain unseasoned breadcrumbs; ¼ teaspoon freshly ground pepper; 6 large eggs, divided; Vegetable oil (for frying; about 1½ cups); Plain Greek-style yogurt (for serving; optional); A spice mill or mortar and pestle