Ground Beef Shepherds Pie
["1 Tbsp. vegetable oil", "1 onion, chopped", "1 lb. lean ground beef", "1 tsp. dried basil", "1 clove garlic, minced", "1 c. green beans", "1 c. tomatoes, diced", "2 potatoes, cooked and mashed", "1 egg, beaten", "1/2 c. water", "1/4 c. shredded Cheddar cheese, optional"]
["Preheat oven to 350\u00b0.", "Coat a 2 quart casserole dish with cooking spray.", "Heat oil in a large skillet over medium heat.", "Cook onion in oil for 5 minutes, stirring frequently.", "Stir in the ground beef and basil, and cook and stir for 5 more minutes.", "Mix in the garlic, green beans, and tomatoes, and simmer for 5 minutes. Transfer beef mixture to prepared dish.", "In a mixing bowl, mix together the mashed potatoes, egg and water.", "Spread evenly over meat mixture.", "Bake in a preheated oven for 15 to 20 minutes, or until potatoes start to brown on top.", "Sprinkle with cheese, and continue cooking for 5 minutes."]
["vegetable oil", "onion", "lean ground beef", "basil", "clove garlic", "green beans", "tomatoes", "potatoes", "egg", "water", "Cheddar cheese"]