How much baby food does your little one eat?

We are struggling with mealtime. It seems my baby just isn’t too interested in solids. We have always given our babies Ferber food first then bottle, but for some reason baby #3 get so frustrated not even half way through her oatmeal or gerber and just screams for her bottle. Thoughts? We usually feed her 2tbs of oatmeal when she wakes with 5 ounces of milk, and then a full veggie/fruit or meat for lunch and dinner with about 4-5 ounces of milk.