1 (8 ounce) can tomato sauce
1 (3 ounce) package lemon-flavored gelatin (such as Jell-O®)
1 cup cold water
1 tablespoon white vinegar
1 (16 ounce) package small curd 4% cottage cheese
½ cup finely chopped celery
½ cup finely chopped green bell pepper
½ cup finely chopped green onions
3 tablespoons finely chopped Italian parsley
2 tablespoons mayonnaise
½ teaspoon prepared horseradish
¼ teaspoon salt
⅛ teaspoon ground black pepper
1 dash Worcestershire sauce
1 dash hot sauce (such as Tabasco®)