Beef Burger, Sweet Potato Chips, healthy Beef Recipes

Ingredients

• 4 large, roundish sweet potatoes , cut into chunky chips
• 1 tsp olive oil
• 400g pack extra-lean beef mince
• 1 onion , grated
• 1 tbsp grated Parmesan
• 1 tbsp tomato ketchup
• 4 small wholemeal buns , halved
• 1 Little Gem lettuce , leaved separated
• 1 beef tomato , sliced
• 1 red onion , sliced (optional)
• 4 pickles or gherkins , halved