I understand where you're coming from. One of my sons, and I, eat very similarly. I also have other children who do not eat this way.
Our diets are very restricted and make it hard to live a normal life. I am always thinking about how I can avoid social eating so as not to face the usual judgement or accusation of attention seeking, when that couldn't be further from the truth. It is a daily anxiety.
We find anything other than bland food, overwhelming, though try to stick with the healthier foods within our limited tolerances. Mostly fresh meat, potato, carrots and broccoli, home made pies and sauces. We eat a lot of bread products and dairy. Neither of us are overweight, in fact we are very slim, however I do worry about the impact on our long term health. We wouldn't be this way by choice, it is a pathological condition and in my long experience, most people cannot comprehend this. In different circumstances, we wouldn't have survived.
My son has an ASD diagnosis and I am undiagnosed, but I think it likely I also have an ASD. Do you think this is a possibility for you?