Shepherd S Pie Casserole Recipe
Ingredients 1 pound ground beef3/4 cup onion2 garlic cloves, minced3 tablespoons canola oil, divided1 cup chopped fresh mushrooms1 tablespoon tomato paste1/2 cup beef broth2 teaspoons prepared horseradish1 teaspoon ground mustard1-1/2 teaspoons salt, divided1/4 teaspoon pepper1/2 cup diced green pepper1/2 cup diced sweet red pepper8 medium potatoes, peeled and cubed1/3 cup hot whole milk1 cup shredded cheddar cheese2 large egg whites Preparation In a large skillet, brown beef, onion and garlic in 2 tablespoons of oil....