Ispetti (Spicy Beef Stew)

Ingredients

• 5-6 tablespoons sunflower oil
• 3 ⅓ lbs beef chuck, cut into 1 inch cubes
• 2 onions, halved and thinly sliced
• 2 ½ teaspoons salt
• 1 teaspoon hot paprika
• 1 teaspoon ground black pepper
• 1/2 teaspoon of turmeric
• 1/2 teaspoon ground ginger
• 1 teaspoon ground coriander powder
• 4 garlic cloves, thinly sliced
• 1 hot green pepper, thinly sliced and de-seeded
• 2 russet potatoes, peeled and cut into medium cubes
• 6 red tomatoes
• 2 tablespoons tomato paste
• 1 tablespoon of vinegar
• 1-2 tablespoons tamarind paste (optional)