Most requirements your body needs are over days and weeks, so it would handle things nutritionally just fine.

As far as microbiome and bowel movements go? Most people need more dietary fiber than they’re getting already. As long as you keep that up so you’re regular and not gassy, you’d be fine.

After all, the human body is able to graze on roots and berries and eat a big fatty meaty meal once a week, or survive solely on meat and fat and water for 8 months of the year. Macronutrient division by meal is well within that spectrum.

I don’t know what would happen to your body, but i know these would be the worst meals you’ll ever have

I wonder what an all-fat lunch would even look like. Foie gras and fat bombs with chipotle mayo? Lol. I don’t think it would be practical and at worst you’d have diarrhea every afternoon.