Preheat oven to 275 degrees.
Heat oil in large dutch oven over medium-high heat.
2 Tablespoons avocado oil
Season short ribs with salt and pepper. Add to dutch oven and sear on all sides. Transfer to plate.
3-4 pounds boneless short ribs, Salt and pepper
Add onion, carrots, and celery to pan. Cook, stirring, for 2-3 minutes. Stir in garlic and cook for an additional 1-2 minutes.
1 onion, 3 carrots, 3 celery stalks, 6 garlic cloves
Add cooking wine, water, rosemary, thyme, and tomato paste. Stir well.
2 cups Red Cooking Wine, 2 cups water, 4 fresh rosemary stalks, 2 fresh thyme stalks, 4 Tablespoons tomato paste
Return short ribs to dutch oven. Cover tightly and transfer to oven. Cook in preheated oven for 2-3 hours.
Remove from oven and shred meat with forks.
Whisk butter and flour into sauce in dutch oven. Serve over shredded meat.
2 Tablespoons butter, 2 Tablespoons flour