High Calorie low fat meals?

I just recently started having issues with my gallbladder and went in for an ultrasound today, although it’s not 100% certain it’s gals tones it’s seeming very likely and my doctor thinks so as well.

The last week i’ve switched to a low fat diet however i’ve been struggling to intake enough calories each day. typically my line has been 2k but it’s been easy to surpass that in the past. However having had to switch to low fat foods i’m barely eating 1,200 a day. i also work a lot and am on my feet pretty much all day. it’s been making me feel fatigued and malnourished along with only making my anxieties worse about losing too much weight to quickly.

does anyone have some good low in fat but still high in calorie meals i can eat?