### Hearty Beef and Vegetable Casserole

This comforting beef and vegetable casserole is perfect for family dinners, slow-cooked to bring out the rich flavors of tender beef and vibrant vegetables.

#### Ingredients
– **Beef and Vegetables:**
– 2 pounds beef chuck roast, cut into 1-inch cubes
– 1 tablespoon olive oil
– 1 large onion, diced
– 3 cloves garlic, minced
– 4 medium carrots, sliced
– 3 medium potatoes, diced
– 1 cup green beans, trimmed and cut into 1-inch pieces
– 1 can (14.5 ounces) diced tomatoes, undrained

– **Broth and Seasonings:**
– 2 cups beef broth
– 2 tablespoons Worcestershire sauce
– 1 teaspoon dried thyme
– 1 teaspoon dried rosemary
– Salt and pepper to taste

– **Optional Thickening:**
– 1 tablespoon cornstarch (for thickening)
– 2 tablespoons cold water (for slurry)

– **Garnish:**
– Fresh parsley, chopped

#### Instructions
1. **Prepare Ingredients**: Gather and prepare all ingredients. Cut beef into cubes, dice onion, mince garlic, slice carrots, and dice potatoes. Trim and cut green beans.

2. **Sear the Beef**: In a large skillet, heat olive oil over medium-high heat. Sear beef cubes in batches for 3-4 minutes on each side until browned. Transfer to a slow cooker.

3. **Sauté Onion and Garlic**: In the same skillet, add diced onion and sauté for 3-4 minutes until translucent. Add minced garlic and cook for an additional minute. Pour over the beef in the slow cooker.

4. **Add Vegetables and Liquids**: Add carrots, potatoes, and green beans to the slow cooker. Pour in diced tomatoes (with juice) and beef broth. Add Worcestershire sauce, thyme, rosemary, and season with salt and pepper.

5. **Slow Cook**: Stir to combine, ensuring everything is well coated. Cover and cook on low for 8 hours or high for 4 hours.

6. **Thicken Sauce (Optional)**: About 30 minutes before cooking is complete, check the casserole. If a thicker sauce is desired, mix cornstarch with cold water to create a slurry. Stir into the casserole and let it cook for the remaining time.

7. **Serve**: Once cooking is complete, remove the lid and stir gently. Taste and adjust seasoning if necessary. Serve in bowls, garnished with chopped parsley. Enjoy with crusty bread or over rice.

#### Notes
– Customize vegetables based on your preferences or what you have on hand.
– This dish can be made ahead of time and reheated for a quick meal.

#### Prep Time
– 20 minutes

#### Cook Time
– 8 hours (low) or 4 hours (high)

#### Total Time
– 8 hours 20 minutes (low) or 4 hours 20 minutes (high)

#### Yield
– Serves 6-8 people