Preheat oven to 350°F (180°C).
Have ready the measured almond cream and the sliced peaches. After the dough is rolled the assembly should be quick so the pie crust doesn't start to soften too much.
If using homemade crust: To roll the dough, start with the disk of cold dough on the counter, roll it a few inches, and finish on a piece of paper that will then go onto the baking sheet with the assembled galette. You will need to roll the dough about 2 extra inches than the galette size you want to make.
Lightly flour the counter space and have ready the piece of parchment paper at least 8x8 inches.
Take out the dough from the fridge and begin to roll it, lifting and turning it a quarter (I do it to the left) regularly, making sure that it doesn't stick.
Make a circle of roughly 11 inches in diameter to have a final 8-inch galette. I recommend transferring the dough to the parchment paper when it's about 9 inches and rolling the rest on the paper, even if the paper is smaller. You will turn the edges inwards so don't worry. At no point should the dough start to warm and stick too much to the paper. If this happens, put the paper with the dough on a sheet and chill the whole thing for a few minutes before continuing rolling.
Spread the almond cream in the center, making a circle and leaving about 2 inches without filling.
Arrange the peach slices any way you want.
Dust the fruit with the sugar and start turning the leftover crust inward. It will fold in small pieces each time you lift it.
Complete the round and sprinkle the outer edge with the sliced almonds. You can add an egg wash first if you want to. Simply mix a lightly beaten egg and a tablespoon of milk and brush before sprinkling the sugar.
Bake for about 40 minutes or until the dough is golden, the fruit bubbly and the almond cream somewhat set.
Let cool on a wire rack until you can carefully transfer it to a serving plate.
Eat warm or at room temperature sprinkled with powdered sugar, a scoop of ice cream or whipped cream and a drizzle of honey.
Store leftovers at room temperature for a day and after refrigeration for 3-4 days, always wrapped to avoid them from drying out.