Egyptian Potato & Beef Stew - Potato Glory

Ingredients

• 4 tablespoons butter or extra virgin olie oil, divided
• 1 pound beef chuck roast, cut into 1″ cubes
• 1 pound fresh Roma tomatoes, diced
• 1 teaspoon kosher salt
• ½ teaspoon freshly ground black pepper
• ½ teaspoon cinnamon
• 1 pound Rosi, peeled and sliced
• 1 large white or yellow onion, halved and sliced