PEI Potato and Spinach Stew

Ingredients

• 4 medium PEI potatoes
• 1/2 cup beef stock
• 1 tbsp vegetable oil
• 1 onion (chopped)
• 2 cloves garlic (crushed)
• 1 lb beef (round steak, sliced very thinly)
• 2 tsp basil
• 1 tsp lemon juice
• 1/4 tsp salt
• 1/4 tsp pepper
• 1 10 oz pkg fresh spinach (coarsely chopped)
• 2 tbsp flour
• 1 20 oz can diced tomatoes (divided)