This microwave sweet potato gratin is as good as other similar recipes that use more ingredients and more complicated methods.
As the name implies, this recipe uses a microwave to partly cook the sweet potatoes.
With only 2 ingredients that you need and a super simple method that you use, this recipe will be the one you want whenever you fancy having sweet potato gratin.
A savory dish of sweet potato
The first-time I tried sweet potato gratin a few years ago, I fell in love with the dish straight away. It was so flavorsome and tasty to have with meaty dishes, such as roast lamb or chicken. And of course with plenty of veggie trimmings i.e. roasted parsnips, green beans, Brussels sprouts, etc. In other words, with all those lovely festive roast menus.
Before I had the dish, I didn’t know that a humble sweet potato can turn into a posh elegant looking savory dish like Gratin. Or any savory dish really. Sorry, sweet potato 😃.
Because, where I’m from (Indonesia), this root vegetable is very popular for sweet dishes. Mainly desserts. And cakes. Maybe because its natural taste is quite sweet. And I was born and bred in Indonesia and lived there for decades before I fled to the UK. Just kidding. I didn’t flee. I simply relocated due to marriage 😊.
So yeah, I never came across an Indonesian savory dish made of sweet potato. Not as far as I can remember.
Time and energy saving
Anyway, I was quite intrigued by this Sweet Potato Gratin when one of our nieces made for us at one of our family gatherings.
When she told me how to make it, it sounds very easy. But, time-consuming. Well, I mean the cooking time in the oven takes about an hour 😳. For me, that can be classified as time and energy wasting. On top of that, I only have 2-rack-oven. So when I do family roast dinner, there’s simply no space for this delicious Sweet Potato Gratin in the oven.
After the main roasts i.e. lamb or chicken, and vegetables, I’ll have no room at all for a gratin in my oven.
So, I tried to shortcut the cooking method by using the microwave. And it worked!
How long to cook a sweet potato in a microwave?
It shouldn’t take longer than to cook white potatoes.
When I tried to make Gratin in the microwave, I wasn’t sure how long I should cook the sweet potato in it.
But it normally takes 10 minutes to make Jacket (white) Potato of medium size. So I thought I’d have a go with a similar time for sweet potato.
To make the Gratin, I cook sweet potatoes twice. First, I cook them on their own for 10 minutes. And the second time, I cook them with heavy cream/ double cream for about 7 minutes.
After the first cooking time, the sweet potatoes were actually cooked. The second cooking time is more for the cream to get absorbed by the softened sweet potatoes.
Microwave Sweet Potato Gratin
This recipe is very easy and simple, and also it’s quite cheap and cheerful.
For a large oval dish enough for 5-6 people, it only costs me less than a fiver. At the time of writing, I only spent about $3 on this gratin.
The reason it was quite cheap because I only had to buy two main ingredients. Sweet potatoes and double cream. The rest of the ingredients are just things I always have in my kitchen.
Also, I simplified the recipe so that my kids will like it. At times, I don’t use any herbs as many other recipes may use. But of course, you can put herbs if you like.
I’ve come across several similar recipes that use Rosemary, Thyme, Sage or even Oregano.
I personally prefer Sage for this dish. Because it doesn’t have a strong fragrance as the other herbs. Feel free to put your favorite herb though.
You only need about 1 teaspoon chopped fresh herbs of your choice. You can also use dried herbs. But make sure you go easy with dried ones, as they have a stronger fragrance. I would put ¼ teaspoon of dried herbs.