Sear Beef: Heat 1 Tbsp olive oil in a large pot over medium-high heat. Pat 2 lbs trimmed chuck roast cubes dry with paper towels and sear in batches, seasoning with salt and pepper, until golden brown (about 3 minutes on bottom, 1 minute after flipping). Take care not to overcrowd. Transfer to a plate.
Saute veggies: Add 1 Tbsp oil to now empty pot. Add carrots, celery and onion and saute 3 minutes.
Cook tomato paste: Add tomato paste and garlic and saute 1 minute.
Add liquids and GF seasonings: Pour in gluten-free broth, Tamari or Coconut Aminos, gluten-free Worcestershire sauce, rosemary, thyme and season with salt and pepper to taste. Return beef and juices to pot. Bring mixture to a simmer, then reduce heat to low, cover and simmer until beef is fairly tender, about 45 – 60 minutes until beef starts to become tender.
Add Grain Substitute:If using Whole Grain Sorghum: Stir in 1 cup rinsed sorghum. Cover and simmer on low for 55 to 60 minutes until tender with a chewy bite.If using Brown & Wild Rice Blend: Stir in 1 cup rinsed rice blend. Cover and simmer on low for 40 to 45 minutes.If using Diced Yukon Gold Potatoes (Grain-Free Alternative): Stir in 2 cups peeled, ½-inch cubed potatoes during the final 20 to 25 minutes of simmering. Finish with parsley: Stir in parsley. Season with salt and pepper to taste. Serve warm.