In A Skillet, Cook First Four Ingredients In Butter. Combine Cornstarch, Broth, Lemon Juice And Salt If Desired Until Smooth; Add To Skillet. Bring To A Boil; Cook And Stir For 2 Minutes Or Until Thickened. Stir In Rice And Peas. Remove From The Heat; Cover And Let Stand 5 Minutes. Fluff With A Fork.