Since I had leftover meat sauce and potatoes on hand, I made a gratin with them.Coating the potatoes with mayonnaise prevents the food from sticking to the dish, so it will be easy to wash. Also, it makes the dish more enjoyable, so I recommend it. Recipe by Misarin no daidokoro

I made this recipe to use up my leftover meat sauce.Add some ground meat and onions to make this dish even better. Dip some bread into the sauce and enjoy. Recipe by masabagel

When I don't even have time to cook rice, and I want to make an easy dish, I use some frozen or leftover bread that I usually have at home. I also store the canned tomato sauce as well, so when I don't have time to cook, I make this gratin. The canned items come in handy on such an occasion.Other than the bread and the canned meat sauce, you can use any ingredients that you have in your refrigerator.You don't need to sauté or anything. Just use the gratin dish to pre-cook the ingredients in microwave. Make a simple meal, and reduce the dishes that you have to wash at the same time. Recipe by Mimato

I make this a lot during the eggplant season. When I made it quickly for a friend once, she was so happy.A lot of families make this dish.Stir fry the eggplants in plenty of oil. I used olive oil since it's healthier.Use whatever additional ingredients you like.If everyone eats at different times, make individual portions in small gratin dishes, and bake just before serving. Recipe by rie-tin

I tried making this when I had a little meat sauce left over, and it was very well received. Since my friends rated it highly, I decided to publish this recipe.It's a bit of work, but if you do the prep beforehand (say the day before) and then just bake it later, it's great for serving guests, or making for dinner when you don't have a lot of time.For the gnocchi, if you use sweet potatoes for half of the potato content, it takes on a slight sweetness, which is delicious. Recipe by Kechauru recipe

One avocado per serving is fine, but it's very rich so I prefer to divide it up into multiple servings. When used in a sauce the color is really pretty, and 1 avocado can by enjoyed by everyone! So I decided to upload this recipe.I wanted to highlight the pretty green of avocado, so I layered it on top of a bad of soy sauce flavored canned tuna. Please mix well before eating. For 2 to 4 servings. Recipe by ayureo

I wanted to recreate the delicious spinach au gratin that I had in Cancún. The original dish used lots of butter, cream and cheese, but here, I used them modestly.* Squeeze out excess water from the spinach to prevent it from getting watery.* After adding the flour, keep on stirring with the spatula until it thickens.* If you don't mind the calories, switch the parmesan to easy melting cheese for an even richer result.* You can use soy milk instead of milk. Recipe by Kichiri-monja

I've been making this rice gratin (doria) for some time. I always used to eyeball the ingredients, so I measured them properly for when my daughter wants to make it.When making the bechamel sauce, add the milk all at once and raise the heat to high, and just keep mixing and mixing until it starts bubbling! That's it! If you add cheese, the sauce will become richer! Leftover sauce can be used to make a special croque-monsieur for breakfast!! Recipe by Naomoka

I remade my mum's recipe.This dish is very tasty with just the meat sauce although the white sauce will give a rich flavour.Use any vegetables you like.Good for birthday celebrations or special occasions.Adjust the amount of the consommé stock granules to your taste.The grated cheese and panko will create a crispy texture on top. Recipe by salada

Since the firm tofu was 50% off at the store, I made an easy gratin dish with them using store-bought meat sauce.Our oven is at 1000 W. The gratin is ready to eat when the cheese melts and the meat sauce is bubbly. Please adjust the baking time to your oven. Recipe by Ponie

I like tomatoes and wanted to serve hamburger steak with tomatoes, and so I combined the two.Use any vegetables you like. This time, I didn't cook the onions beforehand, and just minced and added them raw. Recipe by Yukijirushi

I once made this dish with kabocha squash as the only vegetable and it turned out quite nicely. Considering the balance of nutrients, I also added other veggies and some Wiener sausages into this gratin. I also had some frozen veggies that came in handy.I don't know if you can call this a Helpful Hint, but as I've written at the top, making this gratin becomes much easier if you can make use of frozen veggies! I highly recommend this when you're short on time. It's butter-free and still very tasty - if you switch the milk to soy milk, I'm sure you can cut down on the calories and make it even healthier. Recipe by Kanonshun