1 tablespoon Olive Oil
4 strips Bacon, sliced
3 pounds Beef Short Ribs, bone-in
2 tablespoons Butter, unsalted
1 whole Onion, diced
2 whole Carrots, medium dice
1 package Baby Bella Mushrooms, quartered
5 cloves Garlic, minced
1 can (10 Oz. Size) Diced Tomatoes
1 can (14.9 Oz. Size) Guinness
2 whole Bay Leaves
Kosher Salt and Black Pepper, to season
2 tablespoons Cornstarch
1 1/2 tablespoon Water
1 bunch Parsley, Chopped