Perhaps each of you could cook your own meals? I'm concerned that this (eating small amounts of high-calorie meals) isn't a healthy or sustainable solution.

Fwiw, I found that making, once weekly, a big batch of steel-cut oats, of brown rice, and of beans -- and then freezing most of each batch in 2- or 3-portion containers -- very helpful. Brown rice gets a bad rap bc the cooking instrux result in gummy rice; I recommend the instrux offered by the magazine Saveur (you can google for them). Also, Minute Rice makes a brown-rice option that's pretty good (tho I'd still push for buying organic brown rice and cooking it per Saveur.)

Changing to a plant-heavy, low-added-sugar (not more than 10g daily), few-lab-chemicals diet helped me a lot. And, I relied on frozen veg bc I mostly dislike cooking and would have eaten fewer veg if prep time had been factored in. Frozen are less versatile, but they're nourishing; I find that broc, cauli, kale, spinach, green beans/string beans, and mixed (corn, peas, diced carrots) hold up pretty well.