Hi Sarah
My baby has a similar routine to yours. He is just shy of 7 months and i have just stepped up his solids to include 3 meals a day and two courses at lunch and tea. He eats approx:
7.30am - 150 ml formula
8.30 am - porridge made with 90 ml formula - eats quite a bit - about 3 tablespoons
11.00 am - 120 ml formula
12 noon - veggies e.g. carrot and peas - eats about 3 tablespoons, followed by half pot yogurt
3.oo pm - 150 ml formula
5.00 pm - fish and veg - eats about 3 tablespoons followed by banana slices as finger food
7.00 pm - 200 ml formula and bed
On this he sleeps through until 7.30am.
I started him on food about 6 weeks ago and have just gradually stepped up the volume. He used to have formula at 12 noon and 5pm so in order to replace those completely i have had to increase his food intake, adding a second course. I always had him on 6 bottles a day as this seemed to allow him to sleep through the night. But i thought 6 bottles and food was excessive and he is now happy to eat lunch and tea withno milk
)
Hope this helps