Juicy Sweet or Hot Italian Sausage Recipe

Name: Juicy Sweet or Hot Italian Sausage Recipe
Ingredients: 2 pounds pork shoulder with at least 20% fat, cut into rough 1-inch chunks (or 2 pounds ground pork, see note); .6 ounces kosher salt; 2 cloves garlic, grated on a microplane (about 2 teaspoons); 2 tablespoons whole fennel seed, toasted; 2 teaspoons dried marjoram; 1 teaspoon freshly ground black pepper; 1 tablespoon sugar; 2 tablespoons crushed red pepper flakes (hot sausage only); 1/4 teaspoon ground cayenne pepper (hot sausage only)