Now, I could lie to you, and let you go on believing these beautiful shots were produced in a lab... but the truth is, nowadays digital photography has replaced a lot of the communication once carried about by traditional photography. There are even, mind you, very beautiful photo filters that mimi some of the actual phot technique processes available. I took these through instagram. Produce... er... um... filter them the right way, and your photography is gorgeous-tastic. Make good choices.
Food is a GREAT subject. Try some baby oil if you want to go like the pros for that glossy shine. Or just spend a few more minutes getting the right consistency... either/or. I went with the spending a little more time, my preference.