Hi all! Soft food doesn't mean a liquid or near-liquid diet! All your dentist means is that if you start mowing down on toffee, or corn-on-the-cob, or tough tough steak, apples, or cheerios, you'll have some discomfort.
Suitable soft foods include: pasta, well cooked, with tomato sauce; Cooked cereals (Cream of Wheat is really good; watch out for the seeds in Red River cereal); soups; mashed potatoes;flaked ham or chicken; canned tuna, untoasted multigrain bread; peanut butter...etc.
A sample day might look like this:
1/2 cup Cream of Wheat with milk and splenda
1 Banana
glass of juice
water of course
Tuna salad sandwich on multigrain bread (avoid the seeds)
well-cooked spinach as a veg (i.e. reheated from frozen -- yummy!)
1/2 cup mashed potatoes, flaked chicken breast (poach a chicken breast, then pull it into really small fine pieces), 1 cup well-cooked broccoli
yogort or sugar-free pudding.
You'll know what you can or can't eat depending on the amount of discomfort that you have. And it depends on what is being done, but most find this type of diet absolutely fine for their needs...

Good luck!