Hearty Beef Stew with Red Wine and Mushrooms

Ingredients

• 2 tablespoons olive oil
• 1 1/2 kilograms blade steak, cut into 2cm cubes
• 1 (200g) brown onion, sliced thickly
• 2 cloves garlic, crushed
• 250 grams button mushrooms, quartered
• 2 (150g) stalks celery, trimmed, thickly sliced
• 2 425g cans crushed tomatoes
• 1/2 cup (125ml) dry red wine
• 1 1/2 cup (375ml) beef stock
• 2 (400g) potatoes, quartered
• 2 (360g) carrots, thickly sliced
• 2 teaspoons coarsely chopped fresh thyme
• 200 grams green beans, trimmed
• 200 grams yellow beans, trimmed