Here's the recipe I found online and modified it to be easy and simple to follow:

175g all-purpose plain flour
1/2 teaspoon salt
1 tablespoon granulated white sugar
113g unsalted butter, cold, cut into small cubes
2 tablespoons ice water

Fruit Filling:
8-9 similar sized strawberries

15 small grapes

1 kiwi
2 tablespoons granulated white sugar
1 teaspoon corn starch

Method:
1. Mix flour, sugar, and salt in a mixing bowl. Cut the cold butter (must be cold) into small cubes and use a fork to press the butter together with the dry ingredients until the mixture resembles coarse crumbs.

2. Add the ice water and mix until the mixture comes together to form a dough. I then used the dough to form the base of the Galette based on a aluminium disposable "pie pan" and store in freezer to keep it cool while preparing the fruits.

3. Wash and cut the fruits into thick slices (halve the strawberries, thickly slice the kiwi, and the grapes should be fine without cutting). Toss the fruits with the sugar and cornstarch.

4. Go crazy. Be creative. Pile the fruits in any manner you like. Fold the pastry edges up. Brush the dough with egg white. Sprinkle with 1 teaspoon of sugar. Bake in preheated oven at 200degC for 25-30 minutes or until the crust is golden browned.

Let's take a look at how it looked like before it went into the oven:

I thought it looked kinda weird so what I did was to round up the edges. And in it went into the oven!

Bon appetit~