How about introducing some whole foods like mushed bananas or avacados? These are the first foods Dr. Sears recommends and it's what I recommend to anyone struggling with getting their child to eat.
My first daughter was super picky with food, so much so that she was not gaining weight. She weighed 12 pounds at 6 months and 14 pounds at one year and that was with taking her to an occupational therapist three days a week to try and sneak a few morsels of food in her mouth when she wasn't looking! I was trying to feed her jarred food and rice cereal...have you ever tryed these things yourself? Not much taste there and really, not much nutrition compared to raw whole foods. You can also try fresh blueberries, they are great finger foods and mush up easy in a baby's mouth. Or how about plain soy yogurt? These are all foods I started my second daughter with at 5 months. Now at 17 months she eats things like bean sprouts, arugula and other mixed greens, raw carrots, brussel sprouts, artichoke hearts, asparagus...you know the densely nutritious stuff we all really need to eat to keep our cells healthy and our immune system strong :)
My first daughter is a lot less picky now at age four. If I want her to try something new, all I have to do is put it on her sister's plate.