Yes; you want to maintain a consistent blood sugar level which will prevent insulin spiking and trigger hunger binges; this is best done by consuming moderate amounts of complex carbohydrates (whole wheat flour or whole grains) that break down slowly rather than refined carbs and sugar that breaks down quickly. You also need the requisite number of fats to assist in digestion, and of course some amount of proteins (a total of 20-25%) of your total intake for maintenance of muscle and structural tissue.
Dietary balance isn’t just a matter of calories in/calories out; aside from the need for a balanced carbohydrate/lipid/protein intake, there is also the issue of satiation; the average person needs to consume about 2-3 lbs of food per day to feel full; with calorie-dense foods, or carbohydrate-rich foods that break down quickly, this can easily add up to several thousand calories. Something like fresh raw vegetables or popcorn, on the other hand, takes up a lot of bulk but has a low caloric density, which contributes to a sense of fullness and helps to moderate hunger (again, provided that you are getting sufficient nutritional intake). A common Okinawan practice is also to eat only up to “80% sated” at a meal, as the stomach takes time to feel filled. Starting a meal with a soup, vegetable salad, or a low-calorie appetizer helps to reduce overconsumption of the main course. (When eating out I general get a half-portion or plan to take half of the entree in a take-home bag to enforce this.)
Focusing on weight is, as noted by others, not a great metric, especially if you are exercising at the same time; if you are replacing relatively bulky subcutaneous fat (around the middle) with denser muscle tissue, you are obviously more healthy and you are increasing your ability to consume and utilize excess calories even at the same overall weight. And BM indexes and other rule-of-thumb numbers are just rough, general guidelines, not hard and fast rules about what you should weight. Your appropriate weight will be based on a number of factors, including skeletal type, natural breast cup size (for women), activity level, et cetera. 100 lbs + 5 lbs/in in excess of 60 inches is obviously an absurd measure. And obviously “just stop eating” isn’t a viable plan in either the long term or short term; starvation diets are rarely effective or medically recommended.
As indicated above, large servings of vegetables and fruits are highly recommended, but I find it difficult to feel completely sated without some animal protein (and accompanying fats) at some point during the day. I don’t know if you’re eating vegan patties and foods because you are vegetarian/vegan (which is just fine if you are, and probably healthier) or because of the lower calorie density, but if you do eat meat you might trade for a small amount of real lean meat and couple of large sides of vegetables or complex whole grains.
As for your mother, she clearly as what we like to euphemistically refer to as “issues”, or in less polite company, “batshit insane.” (I believe the technical term is Guanoneurological Stress Disorder but I find that it doesn’t have the same ring to it.) Given her previous experience, I wouldn’t even discuss your diet with her lest it trigger some kind of repressed head spinning and pea-soup-vomiting reflex a la The Exorcist.
Good luck to you.
Stranger