The recommendation is for babies to not eat solids until they are 6 months old so from that perspective, any amount of solids is too much at this point. The horse is already out of the barn on this one though so as long as she enjoys the solids and is still taking in enough formula, let her eat whatever she wants for solids. Make sure you're doing formula first, then solids, which are for variety and practice with textures and flavors at this point.
I breastfed but from what I recall about formula feedings, the recommendation per day is 2 ounces per each lb the baby weighs so 35 oz for a 15 lb child is more than covering that.
Check out wholesomebabyfood.com for some good info on feeding solids and how to make your own baby food that is more nutritious and tastes better than the jarred stuff. I did all jarred/boxed/processed foods with my oldest son and he's the worst eater in my crew and has the most issues with allergies, etc. By the time I got to my youngest, I switched to homemade baby food and he has always been the best eater and has no allergies or other health issues. It's not all due to diet, of course, but I wish I had fed my oldest more "real" food from the get-go. This is a great time of year to make homemade food with things like pumpkin and various winter squashes being in season. I work FT and was able to make up a week's worth of pureed foods in about an hour on Sundays that I would freeze and thaw as needed during the week. I know that homemade food sounds daunting, but even if you don't go down that road completely, the website gives good info on how to transition out of the jarred stuff later, etc.