I was told I had type 2 twelve months ago, I immediately cut out all sugar , rice, pasta, potatoes, bread ect down to a bare minimum. I have lost excess weight , and I am a vegetarian, I was on only one metaformin and it killed my appetite, everything I used to like is now off the menu, in fact I dont enjoy anything anymore and have given up cooking, I have decaffeinated tea without sugar now, but it is not satisfying. I just heat things up now, I dont have meal times I just eat in the kitchen , get it over as fast as possible. A vegetarian diet is high in filling staple carbohydrates, but now not much is left.
I live in the countryside next to an egg farm so two scrambled eggs on brown sourdough every morning. A semi enjoyable experience.
If I could I would just live on food pills, or human kibble.
I was vegetarian/vegan for a long time and I get your point about it being high in staple carbs. Now I eat low carb, but still a lot vegetarian/vegan.
I am so sorry you no longer enjoy cooking or eating and hope you can regain the pleasure. If you eat dairy, it's easy to get variety and sufficient protein. But it's the pasta or jacket potato that's missing. Still, there's cauliflower cheese. Or cottage cheese pancakes, made with almond flour, maybe sweetened with cinnamon and stevia.
I haven't tried it yet, but Low Carb Food Co does a keto pizza base. That could make a delicious, healthy and easy to prepare meal.
On to vegan: pumpkin seeds add protein to yoghurt, salads, etc. Tofu is a good protein, but a bit fussy to prepare. Seitan is tasty just sautéed, provided you are glucose tolerant. It's delicious alongside a stir-fry, which can be bought prepackaged for easy cooking. I add tinned chickpeas to complete the protein.
I also buy quinoa and cauliflower rice, ready cooked in pouches for convenience, good with various dishes, eg chickpea or lentil curry.
You are lucky to get fresh, free range eggs from a farm. Brown sourdough was a favourite of mine, but began raising my blood sugar too high, so I've switched to a low carb sourdough by Robert Andrew, expensive but I keep it in the freezer and alternate it with small portions of regular sourdough. Btw it makes good French toast, unlike regular sourdough.