Is there a history of any allergies in your family (food ones I mean?) If not, why wait? My DS is jus tabout 17months and has been eating whatever we eat for some time, although he only REALLY began eating much the past few months. Due to financial issues, peanut butter is a staple in our house so he eats that (lots of vegheads give almond milk, and other nut bases from early on) and jus ttonight was mucnhing down on rice and beans. Everything in moderation, but why not beans? the yare healthy, nutritious, and YUMMY!
BTW, is your Doctor well versed in nutrition and do you personally keep his/her opinion in high respect? In my experience (and many others here have similar experiences) our kids Docs have no clue about nutrition but act as if they do. I am sure some mamas here will be able to forward you to some great resources on feeding the wee one!