I would not eat half a day but rather just make them part of your rotating diet. Variety is healthy as long as your choices are reasonable.
I would, however, eliminate things like the chips that you dip into the guacamole.
I have been eating oatmeal in the morning for about 2 months. I had a physical last week including the blood work and xrays. I'm sitting on sawbone's exam table while he's telling me how good everything looked and that I was 10 years younger than my chronological age. I don't know if oatmeal and not eating meat has anything to do with it or not.
I celebrated with about 4 Scotches.
If he knew what I'm really like, he'd be telling me to buy life insurance.