In A Large Skillet, Saute Lamb In Oil Until No Longer Pink; Remove From The Skillet With A Slotted Spoon. In The Same Skillet, Stir-Fry The Squash, Mushrooms, Tomatoes And Onions For 2-3 Minutes Or Until Tender. Return Lamb To The Skillet. Stir In The Rice And Seasonings; Cook And Stir Until Heated Through.