For a spicier kick, consider adding chopped chili peppers or a dash of cayenne pepper. Make sure to taste as you go! Adjust seasoning and sweetness to your liking. If you don't have fresh ginger, ground ginger can be used as a substitute, but fresh will give you the best flavor. Feel free to customize this curry by adding other vegetables like carrots, spinach, or peas for extra nutrition. You can also swap out beef for chicken or chickpeas for a vegetarian option!