Loaded Shepherd's Pie

Ingredients

• 1 lb lean ground beef
• 1 cup mushrooms, sliced
• 1/4 cup onion, sliced
• 1 tsp salt
• 1/2 tsp garlic powder
• 1 pkg (0.87 oz) brown gravy mix
• {“Loaded Potato Topping”=>nil}
• 2 lbs potatoes, pared and diced
• 1/2 cup sour cream
• 5 green onions, chopped
• 1/2 cup shredded sharp cheddar cheese
• 4 strips crisp-cooked bacon, diced
• water for potatoes
• salt