We're going through the tail end of the exact same thing. Our son used to be great with eating jarred baby food, but at 10 months or so he refused to let us put a spoon in his mouth. We thought it might be because of teething, but we soon learned it's his independence shining through. He wants to feed himself, darn it!
We started giving him finger food of different types -- diced veggies, fruit, tofu, cheese, cereal, scrambled egg, etc. It took many tries, lots of effort and some wasted food (which hurts my Yankee soul!) before he would eat what he had gobbled down before, such as peas.
I had really worried that he wouldn't get the nutrients he needs, but after a couple months he's starting to eat a well-rounded diet. Our pediatrician said it is normal and to keep offering small amounts.
Hang in there!