Feeding solids..

How many ounces are you giving your little ones? My guy turns 7 months next week. I have been doing 3oz of oatmeal and a fruit for breakfast and then for dinner a 2 oz veggie and a 2 oz fruit. I am still breastfeeding too, but my pediatrician wants me to nurse after I feed a solid, not before. He still seems hungry after the 4 oz so do I give more?