J.-
I really dislike all the suggetions about "hiding" foods inside other foods. IMO tricking takes too much effort at the end of the day. I am a full-time working Mom too and you just need a bit of repetition. New foods need to be offered multiple times before they are accepted at this stage. For my daughter (14 months), I usually start on a Monday at lunch and offer it again at dinner for about 4 days. By the end of the week, she is usually eating "it" like a champ. I'll return her to things she likes on the weekend and offer the new food at least twice (or more) the following week.
I've also noticed that if she can pick it up and feed herself it makes a HUGE difference. At this stage they are very tactile.
For veggies we started with peas from a steammer bag. The leftovers we just nuked each time we needed a serving. We then moved on the carrots. Then green beans, califlower (although this we had to cook a little longer then I would like - she liked it best mushy) and broccoli. We have even tried white boiled potatoes and baked sweet potatoes.
For fruits, she liked blueberries, strawberry slices, banana chunks, orange slices (especially mandarian), applesauce/apples, peaches (fresh and canned in pear juice), raspberries, etc. It was the same process with the fruits.
As a general rule of thumb, I avoided the salts and sugars except for naturally occuring ones. You could even start with those fruits and veggies that are sweetest (we went with bananas and the sweet potatoes).
Sometimes I found I needed to feed her in stages too as she would eat all of the food she liked before she tried the new one. I wouldn't even let her see the rest of her meal until the new food was at least tried. Also, don't be afraid to hold your childs hands down and place a spoonful of something new inside her mouth. Generally once my daughter got past that first taste, she would realize it wasn't so bad.
Another method we found helpful was making a fruit puree in the blender and pouring it into those old fashion ice pop makers. The frozen treat felt good on her teeth and has helped introduce new flavors.
Good luck and remember a rainbow of food every day!
~C.