Beef Tenderloin without sprigs

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

2 cups beef stock or canned broth, prefer veal stock if possible 1 cup chicken broth or canned low salt broth 4 small carrots peeled, halved lengthwise 16[...]

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[...]