Slow Cooker Sunday! Drunken Beef Manhattan! - butter

Ingredients

• 2 TBS unsalted butter
• 1 large Onion, sliced
• 1/2 lb or 8oz of shiitake, oyster or portobello mushrooms, roughly chopped
• 2 cloves Garlic, minced
• Salt and Pepper, to taste
• 1 Cup Vegetable Broth
• 1 TBS
• 1.5 TBS Flour
• 1 Cup Milk
• 1/2 C Heavy Cream
• 2.5-3 lb Beef Round or Beef Cubes
• 1 lb or 16 oz of White or Brown Mushrooms, sliced (not too thin, they will shrink a bit)
• 1/2 Cup Cognac
• 1 C Beef Broth
• 2 large Onions, thinly sliced