Slow-Cooker Pot Roast Recipe

Ingredients

• 1 (3.5 lb.) beef chuck roast
• 4 1/2 tsp. Kosher salt, divided
• Freshly ground black pepper
• 1 tbsp. neutral oil
• 3/4 c. low-sodium beef broth
• 2 tbsp. tomato paste
• 2 tbsp. Worcestershire sauce
• 1 tbsp. cornstarch
• 1 lb. small potatoes, scrubbed and halved
• 3 carrots, peeled and cut crosswise into 2" pieces
• 1 medium yellow onion, cut into 1/2" wedges
• 4 garlic cloves
• 1 rosemary sprig