Not GLP-1, but moved onto an OMAD diet which is essentially a 23hr daily fast with nothing but neat espresso, cigarettes and water in between - although occasionally I have a small treat or sugary drink.
But now I eat almost exclusively at restaurants and enjoy it, and overall it's cheaper than cooking at home given wastage with many ingredients and desire for variety.
I do eat very simply though, usually south & east asian food.
How can eating at a restaurant be cheaper than at home? Could you give examples?