Sauté onion in shortening in a large skillet over medium heat until tender. Add rice, and cook 5 minutes or until rice is golden brown, stirring occasionally. Add beef broth, salt, and poultry seasoning; stir well.
Cover and cook over low heat 35 minutes or until all liquid is absorbed. Remove from heat; add egg and mushrooms, stirring until well blended.
Oxmoor House Homestyle Recipes