PHP image manipulation

This project involves some rather advanced work with altering images with PHP. If you are not proficient with PHP image generation, DO NOT READ FURTHER. The basic premise of the project is as follows: - Ability to create a virtual "burrito" (yes, the mexican food item) - User selects what ingredients they want, (I have ingredient images), and the PHP script generates the ingredients in layers, in a virtual Burrito. - Ideally, writing can go overtop each layer telling what it is (IE beef, cheese, etc.) Again, the premise is allowing users to add ingredients to a virtual burrito. Example: Add cheese, salsa, beef, rice Display would be a circle, filled with layers of each of those ingredients. If you need more details please feel free to contact me.