Answers:
Fatty foods stay in your stomach longer, and sour builds up while they are here.
You would chew over avoiding sharp foods (an tart food is anything explicitly sour) would be the answer, but those usually don't contribute to the problem.
So avoid fried foods and foods near profusely of grease within them.
any tartness foods approaching salsa, vinegar, citrus fruits, spicy foods, greasy foods, and pop can clear tart too.
You can find list of "dos and donts" if you research "GERD Diet."
Try http://www.gicare.com/pated/edtgs03.htm...
http://www.midwestgastro.com/diet_nutrit...
Have you be diagnosed beside bitter reflux or GERD (gastroestophageal reflux disease)? Your problem may not be "too much stomach acid". It may be that your stomach acid is self forced into your esophagus because your esophgeal sphincter (http://www.nbc10.com/2006/0209/6867277.j... does not close properly. This stomach sharp can erode your esophagus and motive esophageal cancer. You may want to consult a physician if you hold "heartburn" more than 2-3 days a week.
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You want to stay away from foods that are sour similar to tomatoes, oranges, salsa things of that make-up. Try to guzzle more foods that are unfinished for example bread, meat (bland food) to set off out the sharp within your stomach.