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Yea, for big commercial shots, you're getting into "food" that's been painstakingly made up - and is largely inedible.
But foodgawker, and similar site tastespotting, are mostly home bloggers (although some with commercial motive anyway). You can probably pull that off, with practice. Without getting into gory details, you'll want:
-Stage lighting. Your flash sucks, don't use it. Google "DIY light tent" to get some ideas for a well lit space to take pictures of your food.
-Food props - decorative plates and utensils help, but plain white is usually the best. Have a large variety to select the right shape and size plates from.
-Good looking food. Plate neatly, garnish delicately.
Beyond that, macro lenses and wide apertures are nice. But honestly, if you can get those 3 things above, a point and shoot could take pictures for foodgawker - hell, they're cropped anyway.