Preparation software: Adobe Photoshop.

1. First open Adobe Photoshop, and then create a new page with a width of 750 pixels and a height of 250 pixels.

2. After creating a new blank page, select the paint bucket tool and select red as the color (the color can be freely selected).

3. Color the blank page red.

4. Select the brush tool and choose white as the color.

5. Select a hard-edged circle.

6. Add some white dots on both sides of the top of the poster.

7. Open the food picture and cut out the food.

8. Drag the cut out food onto the poster, and then adjust the size and position.

8. Open the text tool and select the size and font.

9. Write appropriate text on the poster.

10. Add a dotted line and a small heart in the middle of the text, and the poster is ready.

11. Finally, save the poster.