In large bowl, Dissolve yeast in warm water. Add flour salt and sugar. Mix well.On lightly floured surface, knead the mixture well with your hands. Roll pieces of dough into any shapes you like.Gently place pretzels onto well greased cookie sheet greased with shortening. In a small bowl, beat egg with fork. Brush tops of dough with egg. Sprinkle with coarse sea salt. Bake at 450 degrees for 10-15 minutes.makes 1 1/2 dozen pretzels.