Beef Tenderloin without mayo vegetables mushroom

itemscope itemtype="http://data-vocabulary.org/RecipeIngredient"> 2 teaspoons butter, divided 1 cup vertically sliced yellow onion 1 cup vertically sliced red[...]

2 teaspoons butter 1 cup vertical sliced sweet onion 1 cup vertical sliced red onion 1/4 cup sliced shallot 3 garlic cloves , minced 1/2 cup beef broth 2 cups[...]

2 teaspoons butter 1 cup vertical sliced sweet onion 1 cup vertical sliced red onion 1/4 cup sliced shallot 3 garlic cloves , minced 1/2 cup beef broth 2 cups[...]