Weight gain is important for the child at this age. If you want to give oats you might have to have use full cream milk or curd with it so it increases the calories for the child for necessary growth. Not formula milk. Better to give food which is rich in proteins or cereals like Raab, khichdi, dalia, dal-rice. Anything preferred should be like paste or puree. Introduce food in a step wise manner, don't rush to change the menu. At end of 9 months, child should preferably take 2 to 3 bowls of meals per day.

1.Exclusive Breast feeding till six months of age. 2.Along with breast feeding start with complementary feeding - cereal based or pulses. 3.It should be liquids--semisolids-Solids in this order. Strat with LIQUID- then semisolid paste like. 4.U can add pinch of salt or jaggery and Ghee to make palatable. 5.initiallly give small quantity then gradually increase it. 6.Avoid giving solid at night time. 7.Try one item at a time to test it for acceptance and allergy. No 8 .Give 3-4 small meals initially. 9.u can mashed potatoes or banana or fruit puree or juice.